I think it was when it was edited to include specific links to Lemmy instances, instead of the join-lemmy.org website

I still see the comment on Spaduf’s profile, but it shows as deleted in the post

it seems like copying Spaduf’s comment to r/fediverse worked, but in r/technology it got deleted for me too

for me it seems like join-lemmy.org, lemm.ee, and even lemmy.world are safe but some of the others will get your comment deleted

I’m not sure what motivated their selection because lemmy.world is the biggest one so I thought that would be the banned one