a good income for a passive state, but I will be more interested in the cost of using the power of this super computer SONM for conventional mining.
Well it won't be cheaper than mining the coins yourself, that I'm quite sure of. Think of it as cloud mining, but probably without the binding several years long contracts with no refunds.
I see there is VISA option. It works? SONM customers can buy computing power using credit card now?
Wait, where did you get that information?
As i know the only way to purchase snm is to buy them on exchange.
As far as I know there will be an option to buy SNM through the platform using credit/debit card. These SNM will be bought from exchanges for you, cause you can't expect every customer buying computing power to be aware of how to buy erc20 tokens from various exchanges and making transactions over the ETH network to send them where he wants to. Sounds pretty simple to us, but crypto hasn't reached the massive public adoption for people to know how to do this yet.