When you do this, you earn Satoshi by selling them for profit, and hence, earn more BTCs. But see for yourself, here is a list of some of the sites that I find interesting. You have to find out the concrete opportunities yourself. One thing which I really like about their platform is that they are available in 11 international languages. When your computer discovers a new block, you receive a certain number of Bitcoins. Meanwhile, the most profitable ways to get BTC require capital and sufficient knowledge of online marketing, blockchain technology, and cryptocurrencies.