It’s interesting, unless you did something, the numbers seem to be slowing down quite a bit, having near stopped for one of the ads.
But if what you said is the case, for the sake of the quality of your product to the user, I recommend disabling the free version the ability to post more than one ad. And you should probably tell potential users what you had mentioned to me.
And if I may make a suggestion:
Make it so that I can disable an ad too. The only option I have is to “delete” or “duplicate” an ad.