Anyone know Crypto Tab? It's a chrome-extension. It's said you can earn free bitcoin when your google chrome is on. I have earned 0.000033994605 BTC so far. I don't know if it's true. It doesn't cost me anything, money or time.
If you are interested, you can get yours here: https://getcryptotab.com/178570. If it's scam, please let me know.