La recaudación del patrocinador viene creciendo desde enero.

Because de + el contracts to del in Spanish.

• de el patrocinador → del patrocinador
• This is a standard contraction and is required in normal Spanish.

The only common exception is when El is part of a proper name, such as de El Escorial.

So here, la recaudación del patrocinador means the sponsor’s revenue/collections/fundraising or literally the collection of the sponsor.

Recaudación usually refers to the amount collected, takings, revenue, or funds raised, depending on context.

Possible translations in different contexts:

• for ticket sales or money earned: takings / revenue
• for a fundraising context: fundraising / funds raised
• for taxes or official money collection: tax revenue / collection

So in this sentence, the best English meaning depends on context, but it generally refers to money being brought in.

Viene creciendo is a verbal structure that suggests something has been growing progressively over a period of time.

It is formed with:

• venir
  • gerund
• here: viene creciendo

This often adds the idea of a gradual development up to now.

Compare:

• crece = it grows / is growing
  
  • more general, less emphasis on the ongoing progression
• está creciendo = it is growing
  
  • focuses on what is happening now
• viene creciendo = it has been growing / it’s been steadily growing
  
  • emphasizes a continuing trend over time

Because the sentence also says desde enero, viene creciendo fits very naturally.

They are very close, and in many contexts they can mean almost the same thing.

• viene creciendo desde enero = has been growing since January / has been steadily growing since January
• ha venido creciendo desde enero = also has been growing since January

The version with ha venido + gerundio can sound a bit more explicitly tied to the present perfect idea.
The simpler viene creciendo is also very common and natural for expressing an ongoing trend.

So yes: the difference is small, and both are valid.

Desde enero means since January or literally from January onward.

It marks the starting point of an action or process that continues up to the present.

So:

• desde enero = starting in January and continuing afterward

This works very well with ongoing forms like:

• viene creciendo
• ha crecido
• ha venido creciendo

Examples:

• Trabajo aquí desde enero. = I’ve been working here since January.
• Las ventas vienen subiendo desde enero. = Sales have been rising since January.

Because Spanish and English do not always match word for word.

English often uses:

• has been growing

Spanish can express that same idea in several ways:

• ha estado creciendo
• ha venido creciendo
• viene creciendo
• sometimes even just the present tense in the right context

In this sentence, Spanish uses viene creciendo to express an ongoing development from the past until now. So even though there is no exact separate word-for-word equivalent of has been, the meaning is still there in the verbal structure.

Because the sentence is talking about the revenue/amount collected as a single concept.

In Spanish, abstract or collective financial ideas are often singular:

• la recaudación
• la facturación
• la financiación

If you wanted to talk about separate amounts or different collections, then a plural might be possible in another context, but here the singular is the normal choice.

Spanish often uses the definite article more than English does.

Here, la recaudación refers to a specific thing:

• the sponsor’s revenue
• the sponsor’s takings
• the funds being collected

Even where English might sometimes drop the article, Spanish often keeps it:

• La recaudación del patrocinador...
• El precio del producto...
• La situación de la empresa...

So la sounds natural and correct.

Yes. Patrocinador means sponsor, usually someone or some entity that supports something financially or publicly.

It can refer to:

• a company sponsoring an event
• a person or organization funding a project
• a commercial sponsor in sports, media, or advertising

So del patrocinador means of the sponsor or the sponsor’s.

Yes, it is grammatically natural in Spain Spanish.

A speaker from Spain might also choose alternatives depending on context, such as:

• La recaudación del patrocinador está creciendo desde enero.
• La recaudación del patrocinador ha crecido desde enero.
• La recaudación del patrocinador lleva creciendo desde enero.

But viene creciendo desde enero is perfectly understandable and natural, especially when the speaker wants to highlight a continuing upward trend.

The subject is La recaudación del patrocinador.

That whole noun phrase is what viene creciendo refers to.

Breakdown:

• La recaudación = the revenue / the amount collected
• del patrocinador = of the sponsor / the sponsor’s

So the sentence structure is:

• Subject: La recaudación del patrocinador
• Verb phrase: viene creciendo
• Time expression: desde enero

No, that would not sound right in standard Spanish.

Crecer is usually intransitive when talking about something increasing:

• La recaudación crece
• Las ventas crecen

You do not normally say someone grows their revenue with crecer in the way English sometimes uses transitive verbs flexibly.

If you want to make the sponsor the subject, you would need a different verb:

• El patrocinador viene aumentando su recaudación. = The sponsor has been increasing its revenue.
• El patrocinador ha incrementado su recaudación.

So in the original sentence, the thing that is growing is la recaudación, not el patrocinador.