I know /. is all about ridiculous analogies but as funny as they are they really don't add much insight.
In this scenario the State's energy providers / regulators don't want Riot to use electricity at certain times because the state providers aren't able to generate enough electricity to meet all demand. Riot is being offered cash to decrease its power consumption, this isn't Riot being unable to use power and asking for cashback.
It's actually a very logical idea, although I can't speak for the Texas implementation, because the alternatives are:
> Maintain the ability to produce so much power that you never, or virtually never, have more demand than supply. The cost of maintaining the ability to quickly cover your once a year / two-year / five year peaks will be vastly higher than covering everything except your top 10 peaks of the year or similar. Keep in mind that in practice this means having to keep multiple conventional powerplants at a state of perpetual readiness just to use them for a few hours a year, or it means investing in huge amounts of battery capacity which would also only be used a few times a year.
> Have power cuts, rolling or otherwise, to decrease power usage down to supply when their are peaks. Not suprisingly this option is not at all popular.
Having a large energy consumer that is willing to decrease consumption at short notice for a relatively small amount of money is a great option for managing a grid if it means you can avoid paying for a coal powerplant to be kept ready and staffed just to turn it on for 40 hours a year.