We have a group for 30 Collab Managers and 15 Alpha Hunters. Alpha Hunters bring in collabs (both discord and twitter) from big well-established/growing/hyped projects which would boost the reputation of your project immensely. Not to mention, hosting an AMA with these projects would bring in a huge influx of members.
As for our Collab Managers, we have a one-of-a-kind service, where you don't even have to post or ping on your server. These two are our most in-demand services, which undoubtedly