The popularity of Bitcoin is unstoppable. Many institutions are participating in investing in Bitcoin. The market sentiment is positive and the price is on an upward trend.
They reached an agreement with an energy supplier to obtain very cheap electricity and can buy a large amount of Bitcoin at a low price. On the other hand, it bought miners and could get more bitcoins.
https://bitcoinmagazine.com/business/marathon-120-million-30000-bitcoin-miners