They publish bounty in bounty section and come to service section to apply and wear signature. Is that not funny to you?
Promoting a product/service and helping promote something are two different things. You might promote something but as a job, you are helping someone promote their project. If they are promoting a scam though, that's where it is wrong.
They do that because they understand that many bounty they promote will never get to the market, many will exit when you invest your money.
Yeah, that but also the fact that bounty in altcoins pays much less as compared to the BTC or direct payment campaigns. Campaign managers are also participants in other campaigns and everyone wants the highest possible payment for the efforts they put into writing posts.
Consider this, does an actor promoting a product always use that product? No. they are promoting it as they don't mind doing it but they use something else because they prefer it.
Also, going as per your logic what will happen if a bounty manager is promoting multiple campaigns? They cannot wear them all at the same time, right?
Yes, some might agree with you that if you help promote a project you should also promote it, but I don't see a problem in either of the two.