and what's changing is how clever Google is getting at detecting spam links and not passing across any benefit from links that are low quality or possibly suspect
May effect any new link builders starting out, but the trash links already out there are still out there, doing damage for those who already paid the linkbuilders. I don't think we can count on the search engines help here, no - this will be upto each webmaster to suss out the spam offenders and squash them so they get no benefit, which is quite easy to do.
So the following should happen:
1. Identify the offending SEO (if possible) - remove links, thus cancel out any help,aid, benefit etc
2. Notify SEO company they got caught and their client has been removed. (save email text for future use).
3. Notify SEos client they got caught and removed.
4. Build a list of offenders and send out to all possible free link sources to warn publishers.
Not necessary to do it overnight, as 2000 thousand a year will be enough for word to spread.
Result will affect SEO's when they have the conversation with their clients about how they both got hit with
'Your client's site just got removed' emails. Although I think everyone with half a brain knows what Linkbuilding is and the effect it has o their business just dealing with it, the costs in time dealing with iy must be huge - so anything that makes it difficult to impossible for these guys to take advantage must be done.
We now do this regularly, and every sEo client gets an email to say they got zapped. This results in at least 1000 visitors not reaching them from us, which results in a lot of new business being lost due to their spammy actions, no matter how justified they feel about it.
Next, the scenario is that the client has a pop at agency, and complains that they handed over a ton of cash, which agent spins them some bs, while tries to save the doomed relationship. Except the client is very peeved and fires the agency. Great news. Cos we know if we gave a load of cash to someone and they promised to do such and such, and it failed - we'd go ballistic and demand a refund. We would also check the quality of such links, and if that turned out be poor, then they'd also feel our displeasure.
Why do so many seo agent clients not complain about seo until its too late - maybe the british don't like complaining?