Well, I'm pretty sure those multi-account features are meant for multiple members of a single household. I'm sure they know that people are sharing among friends, but I don't think they are trying to encourage that.
>Well, I'm pretty sure those multi-account features are meant for multiple members of a single household.
You are correct, I think it is one of those technically grey areas. However in my scenario, given that the same group of 5 shares pretty much every single service subscription and physically spends a lot of time watching it together, I think, even in the intended spirit of household sharing, it sorta follows.
Regardless of that, imo there would be a lot of outrage if streaming services started cracking down on that, and, my guess, streaming services are intentionally not letting that happen.