Are they supporting it already? If I'll start to send some now it will only cost 0.00021924
BTC ($2.87). For those people that are stuck and did never send any bitcoin because of the high fees I guess it's now your chance of sending. The fees went down already to blockchain so take it already and send your bitcoins to your proper receivers and as for checking
https://bitcoinfees.earn.com/ fastest and cheapest fee is 490 satoshis/byte.
No. They said that they will support it in Q1 2018.
Also, you shouldn't blindly use the fees recommended by Earn.com; Instead, I prefer to use this website[1].
Yesterday, while Earn was suggesting ~400 sat/byte fees, I saw that there transactions of 100 were getting cleared, so I sent a tx with a fee of 180 sat/byte and it got confirmed in fucking 21 seconds (the next block). P.S: I could have used an even lower fee but I was in a hurry and didn't want to risk it.
[1]
https://dedi.jochen-hoenicke.de/queue/more/#24h