These are very likely copied from somewhere but can't find the source. Maybe he's changing words or they're originally from Russian articles that are being translated into English:
Armed with an article from Bussiness Insider, we decided to deal with the bitcoins on our own and tell you about it. Let's start with the definition of the term and a brief history.
However Bitcoin differs from other virtual payment systems in the possibility of mining - each participant can play the role of "gold prospector" and find "grains of gold in the ore.
An admin will need to look into it as there could be hundreds of accounts, but they won't.