Interesting that it is "worth" $15/month. Maybe they were never going to pay up. But if they were, that seems expensive when they could just use compromised PCs and devices for ... whatever they are going to do? Plus they had to buy and supply the dongle.
I wonder what the average time the user will disconnect it after they don't get paid?
It may be worth it to just sacrifice it after a month. I am sure it is profitable, but as people become more aware, it will be harder for them to do this.