I mean, I use gitlab, gitea, github, and bitbucket all fairly regularly for different projects, and I haven't seen anything out of the gitlab posts here that I think is wrong.
People disagreeing with you and/or opposing the free offerings of a company known for embrace/extend/extinguish does not mean they're astroturfing.
People disagreeing with you and/or opposing the free offerings of a company known for embrace/extend/extinguish does not mean they're astroturfing.