I'm not saying that it's for profit, but that for many sites like these there is an ulterior motive to offering free bitcoins. While offering uBTC is really not profitable for anybody, I just don't see why giving bitcoins away can help, given that the community has recently exploded in the last week. It may help spark interest, and I do congratulate you on that, but I am just wary on all of these new sites that have spawned in the last week. Plus the supposed company scams and all.
It's just hard to trust anybody on the internet who offers anything free or worthwhile without thinking there's something behind the curtains. I've been around BTC for a while and I've been seeing scam sites since 2011. I'm not trying to bust your chops, I'm just a skeptic.
As long as you get tutorials set up for a various number of topics/miners/software, etc., your site will be super helpful for beginners.
If new sites of all sorts weren't popping up, wouldn't that just mean that bitcoin is stagnant? That no one was interested? New sites means new people are interested. It's up to personal discernment when it comes to which sites to trust.
As for giving away free bitcoin, even free uBTC... philanthropy is a real thing. Some people are just generous. It's often those who have the least, that share the most. It comes from knowing what it's like to have nothing or close to it, and emerging from that experience with compassion instead of greed.