The helpfulness will, I hope, be remembered, and work in our favour when these robots have a greater stranglehold over general economic activities and we become further dependent and subservient to them. Sadly I've not heard of any kind of central database of robot assisting samaritans.
That's right. The theory of Roko's basilisk[1] does not specify which one will evolve into our next (glorious!) overlord, so best to be nice to all of them.
You do not welcome Roko's basilisk. Roko's basilisk is completely utilitarian and does not care about useless things like "welcoming".
Also, it does not seem to know how people get useless under stress, but I think that's just the very normal expectation that others behave like oneself, instead of just looking how they really are.
