[dismay]

A bit of a grave dig but since you got no replies, I'll see if I could help.

Personally, I believe that these accounts are "comment for comment" and "like for like" You can see a group here: https://steamcommunity.com/groups/Repboost and https://steamcommunity.com/groups/rep-comments this is the free way of doing it

There is services like zoneR (I used his CS:GO report bot back in the day) and he does steam comment botting. You can see his thread here: https://www.mpgh.net/forum/showthread.php?t=1259994

Best of luck!