A website like Facebook is engineered with the help of psychologists and neuroscientists and many more professionals and their data has been analyzed and their UX refined to keep people hooked. So STEEM isn't going to be capable of standing upto that. I'll tell you why I'm on this platform.

• The community is the best I've seen with the exception of some smaller forums, blogs etc. There are many who share similar values and sensibilities.
• The tech is top notch.Just check http://www.blocktivity.info
• Lots of potential with @dlive @dtube etc.
• Money
• STEEM>>>>>>>>>>>>>BTC/ETH/XRP
• High Alexa rank in case I needed it in future.
• Cannot be fully censored without taking down 100+ Witness servers + backups across the globe.
• Whatever I put on the blockchain is permanent. Nothing gets deleted.
• STEEM is actually a great crypto wallet + investment

That's most of the reasons. Check out @alexander.alexis his blogs had some good interactions.