I think Jeph is doing a good job writing just how
alien SpookyBot's mindset and perceptions are. They simply don't share Roko's idea... indeed
anyone else's idea... of what constitutes 'value' or 'worth'. Because they evidently have
other means of supporting themselves, they don't really understand the perception of those whose lives are dominated by some variant of scarcity... and possibly even mortality.
One thing Jeph got wrong though: Most kids I know would
love to have the bragging rights of having been treated on the 'SpookyBot Wing'. Heck, it might be a concern about them deliberately injuring themselves just to get on that exclusive list!
In most myths and legends, it's considered rather dangerous to attract the attention and/or affection of something divine, immortal, etc etc. Not always bad, but one's life tends to become a lot more... "interesting."
Yes, Roko is going to have to learn to be very careful about what she says, intimates or implies around SpookyBot from here on. There's no telling what they might do in response from a vague hint from Roko, especially if they think it's a way to get her approval.
Oh, Spooky, you don't BUY friends.
SpookyBot wasn't trying to buy Roko's friendship. They're just trying to behave in a way that Roko would approve of in her friends and not doing very well!