'Oh, "everything?" That's suppressive. Can you be more specific?'
Money, family, friends, possessions converted into money, time, labor, etc. In short, everything.
"It works!" is also suppressive. It's not specific about what it is intended to do nor about what it actually does. It is also suppressive in the sense that it does not lend itself to scrutiny. It doesn't matter what you say critical about $cientology because so what? it works! See how hyprocritical $cientology is? No, it's more like "it works, it works, it works, it works......"
It's an "old school" analogy, but it's like a needle on a broken record. It keeps repeating and repeating, and it's stuck right where it is. As you mentioned, $cientology works in the sense that it extracts everything from you. It also works in the sense that it does everything it can to keep you stuck in it.