Bitmain, the mining rig manufacturer, has announced the launch of a new rig that mines the digital currency filecoin (FIL). Similar to the company’s KAS Miner KS3, the new FIL miner carries a hefty price tag of $ 38,888 per machine. Bitmain Introduces On-Rack Filecoin Miner Bitmain announced Thursday that it will begin selling …