It sounds like a good business that's also running some unethical revenue-enhancing recurring billing scam. Take away the scam and revenue goes down.

Where's the "every month while you're a member" in that text?

"JOIN TODAY" does not imply subscription with recurring charges, just like "sign up" or "create an account" doesn't.

"there's a box you have to click indicating that you accept the terms" - perhaps that gets you off the hook legally, but not ethically.