The manufacturer earns money by selling the hotspots, so not sure what you mean tbh. I think wat you are describing is a anti virus scheme like Norton 360 and Avira are doing by install/hack into PCs with hidden PoW mining code which is unethical/horrible . Bit weird to claim this for a hotspot that hasn’t a connection to your PC and trying to slander something without investigating it properly. I get the blockchain hate (especially PoW), but unfair to accuse every project of unethical behavior if there is no proof whatsoever.