Do you have an example of paid agenda posting? I haven't noticed anything that would suggest that. I've noticed agenda posting but it's most likely purely passion.
While not going to go digging for any, it seems a tad naive to assume that there will not be any unnatural/paid posting on a platform this open and easy access. You should practice good information hygiene either way.
Personally the recent sharp and sudden increase in Tankies is likely a symptom or an expression of it. While that could be a knock on effect from astro turfing elsewhere, see my last comment lol