So what is the difference if we rent or purchase a botnet. It is a free market.
The primary difference is that the cost is fronted primarily from someone who is not benefiting from the purchase / electricity usage AND the people willing to rent / purchase a botnet will be limited to those willing to steal from others / break the law.
Again you are making an moral argument that has no relevance on the economic argument. Don't you realize I get tired of repeating myself. Do Not Repeat Yourself is a fundamental tenet or goal of functional programming.
The demand for botnets will rise to the profit arbitrage compared to renting hardware, because there are a sufficient supply of people and capital that don't see a moral problem with it. Personally I wish viruses didn't exist, just like I wish cancer didn't exist. But living in a delusion is not my concept of rationality.
If the people being stolen from were significantly harmed, they'd be doing something about it. Obviously they don't care enough. Whose responsibility and culpability is it to not secure their belongings?
I suppose you can make the argument that those who rent a botnet will only do so if there is some profit compared to renting hardware legally, but I am not even sure if renting a botnet is illegal in every jurisdiction. And I am not convinced that someone couldn't rent out "mining services" and not tell the renters that a botnet is being employed.
If you argue that a botnet farmer will want to do all the mining himself instead of renting out to the highest bidder, the fact is that there is a price where it is more attractive to rent out than to incur the risk of mining yourself, e.g. guaranteed and faster cash flow, etc.. Why do ASIC manufacturers rent out versus mining with their own hardware. Demand rises to meet supply at rational price. This and competition insures it won't be a centralized outcome.
The point is that botnets are much more free market than electricity. This seems to be beyond the grasp of someone here who is now on Ignore at his own request.
Edit: and this same person can't seem to grasp that unenforceable laws have virtually no impact on the economics and thus free market. He conflates "free market" with his decision that he personally won't choose to rent a botnet. He also can't seem to comprehend that the cheapest electricity goes to those with the most capital and huge economies-of-scale (usually bankster loans and probably also corrupt political favors as well). Whereas, the competition for botnet farming includes any Eastern European or Russian geek who wants to spend a few months learning the art. I mean I really can't waste my time arguing with someone who can't grasp Economics 101. I estimate he didn't even take this course at the university. I aced it. Not a personal attack, just explaining why I am sometimes going to be terse and not explain ad nauseum because I don't want to expend all my time on explaining especially to those who won't get the point any way.