This website is very trusted so you don't have to worry about them.
look at the stats: http://freebitco.in/?op=stats

and yes it's legal.

Hi guys i selling my Freebitco.in accounts with 37 active referral.

I have to sell it because of house bill  

I sell it with the amount of : BTC0.5

FAQ:

Q: why i have to sell my account?
A: i have to sell it because i need to pay bill

Q: how much BTC i can earn everyday with this account?
A: i have a 37 very active referral that give me BTC0.00000112. so if you multiply it with 37
you earn BTC0.00004144 every hour so you gonna earn BTC0.00153328 a day.

Q: Is this scam?
A: absolutely No. im gonna show you live my account with TeamViewer

Q: how can i contact you?
A: my skype is: TheXscripter

so guys please help me i don't want to be homeless