The big question is why would anyone rain assets on Boinc users registered on the rain platform? I can see that being useful for new coins that want to do an initial distribution, but other than that case, why would anyone just give money away?

Now, if Boinc project admins wanted to rain on specific user as an added incentive for doing more crunching or that fit a certain RAC profile - I could see that being practical. Would this option be implemented?