I’m not an oracle, I can’t tell the future.

I can, however, tell you that if you pay youtube for premium, you won’t get ads this month.

It’ll get “worse” with time, because youtube doesn’t have an expiration date. But that’s the price of accumulating information. And people are going to decide wether it’s worth paying for.

Enshitification is when the product gets worse with time and user gains nothing (or loses).

“more ads” is basically covering “increased cost” due to increasing content, and content quality.