I'm a Satanist and affiliated with neither CoS or TST. The leadership of TST are not good people. One of them tried to make himself the god of a cargo cult and the other has a history of making racist, antisemitic and ablist statements. He also owned a website about eugenics until 2018.
That video I linked to is long but it is very well sourced and I hope might give you a bit more insight into who you're supporting if you choose to join or donate to them. There's a lot of comments under the video from ex-TST members, including Ministers and Chapter Heads who've been badly burnt by TST.
Wouldn't it be better to just stop doing the thing that's making the existing reefs die?