[Lea Verou]

Of course they have every right to keep it but I still find it disgusting if they use hacks from here and they don't release theirs.
If you don't release a style probably you don't also use one from here (that's my case, I've never given a style to the community but didn't use one from here either).
If they don't use hacks from here that's fine, but I think they suck when they only install other people's hacks and don't give their hacks.