Comment Re:G+? (Score 2) 167
You can use Facebook to log in to a lot of services as well, but that's not really "using" Facebook because you're not doing anything with what Facebook offers. You're just telling a website that you are who you say you are.
Sounds like you're using Facebook for exactly it's intended purpose: to allow someone to build a big database of things that you do to target advertising. You're not just telling a website something, you're telling Facebook what other sites you visit and care enough about to log in to and what your identity on those sites is.