I'm not convinced that there are real business partnerships between Fread and these journals. It's likely that this just violates their ToS by reselling a single subscription
So it seems pretty likely they're violating these publications' terms of service.
Also- and this is petty- it's hosted on Wix. So there's that.
I think the non-technical founder does most of the front end work in Wix to free up the very small development team to work on the rest of the stack. Something about a lean startup.