There are a ton of clans out there, 2lum and wefightge are not bad. However if you want to learn how to flip, join runetipscc. This is not a maniuplate clan however more of a forum (which they have however will not mention) which will explain and help you to turn your 10 mil into 100mil.
Good luck and if you buy on the day of a release of a merch clan you will make some money, however if you have a good rank (if buy advertsiting or buying for In real life cash) You will make more.
Good luck and happy 'scaping.