How much does it bother readers that WordPress slips more than three (nine+!) advertisements underneath my posts?
I haven’t noticed this as I read your posts. (Maybe it’s something we generally overlook.) Or, maybe it has more to do with the theme I’m using.
It would be negligible to me if the ads were artistic or visually exciting, like the ads in this featured image by Jose Francisco Fernandez Saura:

But no, they’re something else entirely.
Rest assured, any possible changes that can be made which don’t involve going pro with this site will be considered. Let me know if you have any thoughts about this!
