Tough problem - we don't want spam, but people have to be able to share startups repeatedly in case their are updates. I would think that it would be self-limiting, though - people would unfollow other people who sent them the same thing too many times. But we can probably be smart and detect that it's unchanged.
I've now had Alpha reshared 18 times I think..... I don't mind, but @Naval Ravikant you may want to throttle the number of copies someone gets in X period of time so it doesn't feel "spammy."
can't wait to go to an alphadog dinner :)