For the first time, I've now actually looked at which domains are "in online blacklist", and I must say I was surprised that quite a few seem absolutely kosher to me, e.g. weebly.com, tapatalk.com, digg.com, ibm.com(!), sites.google.com etc. etc.
I know that many of them won't work with GSA SER, I was just testing a list of highest DA domains, yet it made me think that if these domains are in blacklists, many there are many others that would be a good link source.
Now I ask myself whether I made a mistake of using online blacklists, ever since I started using GSA SER.
Or can anyone advise me with some more selective settings?