I just can't get into it either. I have no desire to be a part of any of those social networking sites. I already have enough trouble keeping up with friends and family!
Most of it's spam and not actually an invitation e_e I get 3 or four a month form the same people every month... and yeah..no. I just delete delete delete everything that isn't a coupon or giftcard w/e
I did once, and google+ is a barren waste land aside from that one friend posting a stream of music videos or posts about how much he loves his boyfriend all the time. Love ya Tim, hate the site.