what this about giving btc away or is it a fake group on facebook and then this xt-miner all look like scams
Yes if you are referring to posts on Facebook yes these are most often scams please be careful.
Especially when they ask you to send them BTC in order get $hit loads more for BTC free! There is that old saying: A fool and their BTC are soon parted! So don’t be a fool and never send BTC to anyone even if it is your own Mother!