The LinkedIn group is used for posting asking for for employment, not project or gig work.
This marketplace is for people posting small project and gigs who are looking for others to do the work in a paid, small gig, to be discussed here.
See the example I posted here, which is very different than the LinkedIn group:
Anyway, I don't think many people will post small gigs requirements like this, so it's not a problem at all, I think; and this will be the first example of the correct way to post in the Marketplace