They started accepting Bitcoin as a form of payment because they have owned the Bitcoin dev team Blockstream for 5 years. AXA gave them 55 million USD. In turn, Blockstream quite litterally "blocked the stream" by not allowing upgrading 1MB blocks to 2/4/8 as was intended in the scaling plan. Blockstream then created their own sidechain called Liquid so you could trade off of the BTC Chain with lower fees(those fees are paid to, you guessed it, Blockstream!)

Blockstream creates the problem and sells the solution...

Oh, and AXA is a New World Order/Bilderberg type thing.

Bitcoin = BankCoin.

Relevant links...

Blockstream is now controlled by the Bilderberg Group - seriously! AXA Strategic Ventures, co-lead investor for Blockstream's $55 million financing round, is the investment arm of French insurance giant AXA Group - whose CEO Henri de Castries has been chairman of the Bilderberg Group since 2012.

A MEGA collection of 100+ links with evidence regarding Bitcoin's takeover and problems.

Steemit's takeover was more obvious because Justin Sun's an idiot heh.