Google are doing this because the reason G+ is floundering is nobody is on there. Forcing people to use it is one way of getting more people on there. If even

Google are doing this because the reason G+ is floundering is nobody is on there. Forcing people to use it is one way of getting more people on there. If even on in a thousand people stays to look around, that could mean a snowball effect that causes a massive spike in G+ users.