Key word there is GAMERS. Say you're against DRM, a friend of yours comes around on the whole DRM thing while you stay firm against it. He quickly gathers... 7 online friends in a week but only 4 add him to the family group. Not a stretch at all considering everyone is online. He gets 1 game from each person and for arguments sake, they average at $40. That's $200 saved on GAMES in the first week alone. Half the cost of the PS4, not including games, accessories or PS+.
Implying this is how it would have worked. We still had no details. All we had were vague statements. I said as much right at e3.
I also said that that was the one feature that I would buy an xbox for. However, it's a really hypocritical feature. MS was all about protecting "the developers" with the DRM, yet giving up to ten gamers the ability to play a single purchase is beyond used games, probably beyond piracy as well.
We have that rumored pastebin from the employee who says the sharing was for a demo. That makes a hell of a lot more sense.
Still...you want to share games with friends that much? Get a ps4 then, because you can stream them to your friend's console :/
EDIT: Also implying that those 7 people wouldn't have been 2 people given the preorder numbers. Your 5 other friends would've been on wiiu or ps4 instead.