[dwohnitmok]

There are many ways for a project to no longer be worth the company's attention. E.g. it might be the case that total costs factoring in on-going engineering energy and money (which is quite different than just compute costs!) are too much. It might be that political risk exposure from the product isn't worth the benefits it brings (Sora was always a lightning rod of criticism). It might be that the opportunity cost of engineering and/or compute resources spent on a product is too high (very different than absolute cost).

All this is to say, even for very compute cheap things, companies shut down "mostly passive income" revenue streams all the time (see e.g. Google's graveyard of products). There are all sorts of other organizational costs associated with ongoing maintenance of a product.