A lot of things you can do to earn I think they were referring to signature campaign which a company will ask you to wear their signature on your profile, make post and earn that's one of the ways to earn here but there's a lot of things you can do such as selling something in exchange with cryptocurrency, give professional service, offer skills and also you can apply to bounty campaigns and airdrops where startup projects run a campaign and all you have to do is to apply do the work and earn their coin but be careful most of the projects are useless/worthless so review first the project before joining bounty campaigns.