I assume by sponsor you means scholarship. It's tough to land one due to the game having a lot of people wanting to come in (and not have the budget for it) and too little boss to support them. Like a 10 slots scholarship can have 1,500 applicants. Just saying this early so you know about the situation.

There are a lot of scholarship recruiting on many social medias or on the official Discord server. There's a dedicated subreddit on Reddit(r/AxieScholarships), a lot of groups on Facebooks, and so on. Just google "axie scholarship" and you will find a lot of teams expanding their scholar counts. That's the way to find scholarship if you don't have any connection to anyone.

If you have friends or whatever who plays, you can also approach them and ask for them to open a scholarship team for you. I call this "private scholarship". It's less competitive than public scholarship but you will have to know people.

On an unrelated topic, I see cryptokitties is still there as of now, but I assume it's on a steady decline?