That only means that Google dont like them anymore just like the profile links..
NOOB ALERT NOOB ALERT!!!!
Ah - Google doesn't like certain platforms any more.
Nope that's not the case.
Google have no problem with profile links, blog comments or any such thing.
They do have a problem with a linking background with 30,000 of them created inside 2 hours.
Which is what people did for years.
A PR5 d0follow link is a PR5 d0follow link no matter where it is
If all you have is thousands from the same platform type though (which with Scrapebox and Xrumer is what people were doing with Comments and forum sigs) then that's your method that's crap not the sites themselves.
Mixing forums and blog comments in with all the other link types in a BELIEVABLE RATIO is exactly fine.
Having a total of 35,000 links to your site and 34,900 of them were created on the same day and are all blog comments is just lazy shit marketing and leads people to think blog comments are crap.
They aren't crap - the link builder is crap (lazy assed - deserves to fail)
This whole idea of "this platform link is crap but this one is good" is one spread by idiots who haven't got a fucking clue about SEO.
Scritty