a couple of reasons I think we see so many 1) the development time / potential number of users ratio is attractive for a developer (easy 100+ watchers on githu

a couple of reasons I think we see so many 1) the development time / potential number of users ratio is attractive for a developer (easy 100+ watchers on github etc) 2) many people have built their own grid system over the years and feel like sharing them, documenting it and putting it on github isn't hard.