Im not sure what you mean... Specifically who do you expect would be a good sponsor for your channel?
You get one by asking sponsors to sponsor your channel. If they think its worth it for your size of channel or whatever they will sponsor you for the advertising benefits.
But usually you have to have a fairly large channel to consider this an option...
i got an offer by critical grips tho I'm not sure if they are legit here is the link
https://twitter.com/CriticalGrips also this is what they said.
Hello, Critical Grips™ Is interested in sponsoring you. We are a gaming company that sells thumb grips for PS3, Xbox 360, PS4, Xbox One.We are starting to develop a few more new products within the upcoming months. PLEASE READ: Critical Grips requires all upcoming Sponsors to purchase over £5 ($7.50) worth of our products (Not Including Shipping) because our company believes we shouldn’t sponsor anyone without them having our product and loving it in order to promote Critical Grips. We hope this wouldn’t be a problem at all for you! Once you have made a purchase please provide us your Order Number. If you are able to do it now it would be much appreciated so we can finalize this deal ASAP. You will earn free grips every 4 sales from every sale completed, as well as find prizes and rewards by being an active member of Critical Grips.
Any problems?