I always hit problems with it though. Let's say I can find someone I trust. Maybe it's me. Say I only enter online spaces, at least with intent of discussion, with those I've met in real life. Well, at some point, someone I've met face to face would be incentivized to maybe share a link to their friend's concert. Perhaps there's a free guest list spot in it for them if the show sells out. Or maybe it's all gravy, but eventually:
I want to expand the network we've created together, and it means trusting someone else to bring in people to the online space I've never met in real life. This could again be fine for a long time, but won't someone eventually be incentivized (especially if this practice were common) to promote this supplement, promote that politician...?
(recognize astroturfing is different from the impending slop tsunami but both feel to be in the same stadium)