Small instance here. One user (me) hade a few mostly technical posts about a bitcoin lightning network client they were developing on, and reposted some content along similar lines. From the perspective of software, among contributors and operators. We're now defederated by at least a few instances for "crypto grifters" or similar. We won't be bothered to investigate and follow up to see if/how it's propagated until one of our users raise an issue about it.

Much of the active fediverse have had quite particular culture with very narrow corridors around some things, of all varieties. Some of these groups (in lack of better word) demonize each other. Those who take up running open general instances for years with no financial incentive are sometimes also of a particular kind within that.

Some are also intentionally insular ("safe spaces" come to mind) and will mute or defederate anyone identified as not part of their in-group.

I've also seen instances blanket-blocking anything Pleroma, because "all the bad people come from Pleroma". I've even seen it called evil software because it affords more customization of filtering, rewriting, and federation.

If the fediverse does get traction over time and the demography widens, I think we'll have much fracturing, possibly pushing protocol changes and incompatible forks.

For now: Haters gonna hate, what can you do about it