I think you’re thinking of paywithfour.com

Which seems to be a standard by-now-pay-later company, which isn’t necessarily a scam, but those companies are very predatory with excessive fees and interest rates and such so they certainly feel scammy. I didn’t do a deep dive on them so I can’t say if they’re necessarily any worse or less legit than any other company (or maybe even better)

But four.com seems to be some sort of enterprise authenticator/SSO company . The website is weird because it doesn’t really tell you much about them, it just kind of has a link to request an invite to sign up

I figure there’s two main options with that. Either they’re sort of a fly by night company just sort of squatting on the domain hoping to profit off of selling it and just have the shell of a website up to give an air of legitimacy

Or they’re just really focused on their enterprise customers and see no reason to really have a public-facing webpage, either your company uses them and you need to log in to manage your account, or you have no real business with them. Maybe they’re sort of a legacy system that a parent company is keeping around to fulfill a contract, maybe they’re getting enough business from in-person sales and word-of-mouth and don’t feel the need to risk overextending themselves by marketing more aggressively

Or of course it could be something nefarious, but without looking into them too much nothing on the face of the website gives me any particular reason to think that.

Is that all it is just a scam? No just four.com