For now at least, it seems the paying customers don't see ads.

    Who may see ads

    We do not show ads to users on Plus, Pro, or any Business plan,
    or to any users who tell us or we predict are under the age of 18.

"In a fight, who would win, Pikachu or Spongebob Squarepants?

What is the best episode of Bluey?

What are the IRS' exact rules for claiming office space as a deduction on my tax return?

Where can I stream Sesame Street for free?"

Ah, ad dodging, the true 21st century gridiron.

Funnily those are the customers you would most want to target with ads since they should have money

> We do not show ads to users on Plus, Pro, or any Business plan

Not yet!

“In order to serve our customers better, we are phasing out the ‘Pro’ and ‘Plus’ plans, which will be replaced with new ‘Premium’ and ‘Extra’ plans. In addition, our ‘Business’ plans are now being replaced by improved ‘Corporate’ plans.”