Not a scam scam but maybe sort of misleading marketing for a bullshit product.
I once bought a forex trading “method” that sounded like it had merit but it didn’t. Wasted €60 on that, not life threatening but still sad.
Forex trading is gambling and there is no method to increase the odds. Or I’m not meant for it as you need nerves of steel but that still makes a method like that worthless for most people. Just like PUA works but only for chad.
I once Subscribed to a NSFW Website because it advertised a Free Week. I didn't bother reading the tactical Small Print. Three Weeks later, I discovered I got charged with Two Weeks Subscription Costs. (I thought I'd been unsubscribed automatically) They made it hard to Unsubscribe from as well. It was a big enough Scam at the time that many People were talking about it on Forums, sharing their similar experiences.