There is no free Bitcoin anymore and for every Bitcoin you earn now,there must be a price to pay for it.
Don't you know about bitcoin halving clock? there You can still earn free bitcoins. But you have to believe that there are less free bitcoin earnings than ever. Satushi Nekamo has created this clock in such a way that it will be automatically distributed to all mining users. And there are thousands of people earning bitcoins by mining for free. And you can earn free bitcoins by mining from there if you want.
To mine bitcoin one need a very expensive computer device and software e.g Asic and the rest are the most popular manufacturer of Bitcoin mining equipment, and also bitcoin mining requires a lot of electricity to keep the device running and that also costs money.
So Bitcoin mining is far from being a free activity even bitcoin halving only rewards those miners that mind the rewarded block, not every jack and harry.