Just to be clear because some people think they can just post anything and earn money. Only quality posts will get you rewarded. Posts about other bounties or other non-interesting posts like that will not make you earn any stakes.
And complaining about it will not change anything to that since it was written in the first post.
Being able to join a signature campaign is a privilege, not a right.
Where did you mention these statements before? Bitcoin talk forum moderators itself removing are banning scam posts. The signature campaign is for spread and promoting the web link. Asking quality in posts??? it is not content writing....very bad....
"In order to get the number of stake that correspond to your rank, you need to do at least 10
constructive posts during a week"
I know constructive can be vague meaning but that gives flexibility to bounty managers to eliminate 'bad posters'. There is no certain word for that. Some managers just write that for being flexible and some are really looking for that. Obviously Dether cares about the quality of posts. And if you look previous pages there are some members wasn't accepted at all. That also means current accepted participants should keep the quality of their posts.
You're right it's about the spreading the word. But I also think there is a difference when people see some signature associated with good quality post and bad quality post.
Some bounty campaigns care that, some doesn't.
And please contact with him if you think he made a mistake while checking your post. It could help, everyone should get what they deserve.