Of course, you'll get something in return for helping promote the server. The server has a PixelTuber rank which comes with a lot of perks, equating to a known donation rank. You can view the rank info here. Apply here if you wish to, but make sure you've read the guidelines :)
Similarly, you can apply herefor helper and moderator position, but make sure you've read the guidelines for it as well. As much as we're in need of staff, we also do not want every applicant to just get accepted right away. We want the best for the server, and of course the better you are at helping, the more trusted you are, the better your chances. Everyone starts out as a helper and progresses up to trial-mod, mod, head-mod, admin, head-admin as better they perform.