Ubuntu has had all three of those things. Amazon ads in the search bar was awhile back. Not sure but I assume they still hijack installing Firefox using apt and instead install it using snap. And Ubuntu Pro popups are a new thing.
What would it look like? I'd guess Amazon ads in the search bar, proprietary package managers overriding the old open package manager, and popup ads for distribution Pro?
Seems like it's cheap to start the bidding at $2500 but the cheapest thing is probably the initial purchase price after moving it, buying the needed cabling, and electricity bills.
It's been a minute since I used C/Cpp but if you compile with debugging symbols and using gdb give you info like in Java? At least the location of the crash.