i am 100000% more active than my 2 useless refs put together,all they do is click a few ads a day,doesnt even move the earnings the slightest.i just depend on myself but yes i do agree fb is good for promoting your url for free and make sure you write something catchy to entice ppl to join you
i havent done it yet coz never got round to it,too busy with work,here and my other 40 sites i do but i will now and let you know after a week if whether i had any success or not,never know until you try buddy