 Argo Blockchain PLC LSE:ARB, OTCQX:ARBKF, NASDAQ:ARBK, ETR:0XP reported improved numbers for the month of April and promoted business development executive Justin Nolan to the role of chief growth officer. For the month of April, the cryptocurrency miner generated 5.5mln of revenue in April, up from 5.2mln in March, as it mined 166 bitcoin or bitcoin equivalent BTC, up from 163 BTC the month before. 