Bounty campaigns help promote a project on social media, and increase followers on official social media accounts.  and grow the community on their Telegram or Discord servers. But Signature Campaign doesn't do these, it only promotes a project within the forum. Social advertising is very important if your project has a token and needs to sell those tokens. However, signature campaigns work very well for gambling sites which is why you will find almost all long term signature campaigns on this forum are gambling related.