Of course not, just like when you pay for Netflix or Prime Video there are no ads ... right? ... right?

Eventually everything includes ads. It's just a question of time scale.

The more money you pay, the more valuable your attention is to them. The advertisers really want every last dime of your disposable income.

No. The real "pro" subscriptions are for those with money enough to pay for ads to be placed into other people's answers.