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So CryptoTab, chrome browser btc miner, has contest for 0.3btc 0.2btc and 0.1btc for first 3 places for members with most Refferals. I'm using CryptoTab myself for a month still don't know if they payout but it looks good to me...
If you would like to join https://getcryptotab.com/517915
- Add it to Chrome
2.Swipe mining to MAX
3.Find refferals for more profit.
Good luck ^^