So, this came a bad time to say this, but, BTC-Flow is no longer exist, due to the website keep going down and something could be true that the owner of the site ran away. I hope something bad happens to that owner. It's kinda embarrassing, since that owner dupe a lot of users. 

But, there are other ways to earn Bitcoin.

Here is what I recommend:

MoonBitcoin: http://moonbit.co.in/?ref=51b88041cdf3

BoxBit.co.in: http://boxbit.co.in/?ref=1Jr7XHxikUBeiNbXPxYanm3unwVc8JovDv

Battlebit.co.in: http://battlebit.co.in/?ref=254

zBitco: https://zbit.co/?r=uZrQVR

CoinDigger: http://coindigger.co/?r=28a1f61b8a

Bitcoin2048: http://bitcoin2048.com/?r=32651

Good luck!