There is still plenty of Window Server using enterprises churning out .Net Framework code that must run on IIS. It's shrinking market for sure but it's still a market.

If they are willing to spend money on Windows Server, 3k a year to make it not less painful is probably worth it. Remember, any company using Windows Server is not hiring skilled DevOps/SRE/Ops, it's probably average at best, low paid workers. It's the type of people who have probably never heard of HackerNews either so it makes advertising here an interesting choice.