tedster - 3:30 pm on Apr 4, 2013 (gmt 0) [edited by: tedster at 3:31 pm (utc) on Apr 4, 2013]
No change in Google's policies that i can see. These are the kinds of thing that have been going on for years.
Link seller sites can lose PR, in increments according to the severity of their infraction. Their outbound links get ignored, but there's not necessarily any true penalty applied to the sites they link to because of one link. If the target site shows a widespread pattern of paid links on many different sites, then they certainly may be penalized - as we often discuss here.
The one slightly new factor for me here is that ALL the seller site's outbound links may be ignored, even those that were not paid for.
[edited by: tedster at 3:31 pm (utc) on Apr 4, 2013]