I've also noticed that in most cases (not all, but the majority) the person making the reseed request tends to have low sharing ratios, e.g. less than 0.5. Perhaps the two are related.
I wish there was a way to donate seedpoints to those who reseed. I usually end up giving seedpoints to the original seeder, as that's the only person I can identify (I've only had one reseed request fulfilled though). Perhaps there needs to be the ability to attach seedpoints to future requests which goes to the first person to reseed it (or the original seeder) before they can be sent?