There is only one way to be a registered member of The Church of Satan
, and one must be a registered member to become an active one.
Now, for someone coming from a faith that wants 10% of your total lifetime income, it seems rather quaint, doesn't it?
You get a red card. No scam, because we don't say or imply anything else. Moreover you need not be a member to be a Satanist---that would be between you & yourself.
However, if you wish to honor the organization that IS Satanism, as per the founder of Satanism, and consider yourself a part of it, well, $200.00 is the price of admission.
I know very few who not only wouldn't regret that cost, but wouldn't willingly have paid more.