After seeing how profile/blog comment links have recently been 'devalued', I'm inclined to say G is moving towards disregarding them completely, but why doesn't it just do that right now if it wants to fight spam so much? I mean, surely it can't be that hard to isolate what a 'profile link' is and assign no value to it. Currently they are valued at very little that's why quantity is needed, but what about an absolute 0 value. G knows blog comment and profile spam is the most popular method for artificial rankings, so why doesn't it just cut that off? Why was it necessary to invent nofollow? Surely G has analysed what Xrumer / SB do and should act against it?