And what is wrong with members wearing signatures of services that promote Bitcoin?

You do realize that there are so many bitcoin services that have launched and thrived due to adverts and exposure in this forum, right?
Aren't you the same people who keep yearning for Bitcoin adoption?

It's a free world here, If by any chance you don't like Bitcoin paying signature campaigns in the posts and replies, then create a telegram group or discord server where you can discuss without any sigs