The moment when I had downloaded the update for PvZ2 on that one late of night, and saw the fact it added the ability to pay to start removing ads, I knew someone on the EA Forums was going to complain and make a post about this. So far, I haven't personally encountered any ads myself when I had purchased a lot of premium plants from many years ago. And I will report back here if I do somehow.
I mean, the fact that you had to pay $5.99 for no ads EVERY 30 DAYS is a big red flag. (Not to also mention that the patch notes did not even tell you about this feature even being added in at all in the first place.)