Site is new...owner is the same of skybtc, coinbooster, dreambtc, etc.
They will stay for some days and then stop paying like always because:
1)they are the usual scammers;
2)rates are unsustainable.
Their aim is to get a lot of traffic while the rates are low/normal and then stop paying/drastically change rates while earning from ads' views/clicks.
I will still use it but don't hope too much about it guys.
edit.
http://www.30bitcoin.co/terms.php awesome terms

If this website is really from the same owners if skybtc then mine advice is stay away from this website. They will scam all of you. Really hope people who keep scamming people all the time once will be caught and locked up.