It is peaking rates where they make $ as they spin up so quickly...

It is peaking rates where they make $ as they spin up so quickly ( just a jet motor attached to a alternator in effect) and as they are so compact they can be placed at existing infrastructure . Depending on other storage and generation there may be a option to guarantee a min amount annually as you say bu with unreliability of existing networks who knows, As they are nit required as network is firmed up in one are they are modular and can be moved elsewhere . As for gas cost the govt has totally stuffed it but a contract for supply with capping could work and in theory if govt dampens gas usage there may be a oversupply 5 years out domestically depending on what projects come online. Positives of gas is that it is quick and easy to install and run at existing sites , can help harden and create a distributed energy network and a good infill for peaking and there is downsides as well - cost , greenhouse etc. We have to remember the true cost of wind and solar without rebate when there is a oversupply in the future as they are pushing up average cost of electricity that affects whole economy and that affects industry and inflation going forward .