I've started to do the same. I don't know how sad it is; it signals to me that they have no idea how to select good engineers and don't care about interview fee

I've started to do the same. I don't know how sad it is; it signals to me that they have no idea how to select good engineers and don't care about interview feedback. In my experience, these are also the companies that ghost you if they go with another candidate. You want me to code something for you? Sure, I'm happy to sit down with one of your engineers and we can collaborate on a pair programming exercise--something that can be completed within a couple of hours and doesn't require domain knowledge. That way the company is very mindful of how much time it takes, because it actually costs them something (engineer time). Otherwise, it's all too common to see projects of the "rebuild half our app from scratch in a couple days, but use this terrible schema and do it with our exact stack, which you may not know yet" variety.