Your tool needs to take into account closed/suspended/banned accounts as the bulk of these were picked up and acted on by Flippa already some time ago:
- mycompanyname: on permanent probation for shill bidding 12 months ago (see below)
- flipjoy: banned over 12 months ago for shill bidding
- DevelopConcept: closed three days ago as a duplicate account
- StarBusiness: banned over a month ago for having a whois match to banned/suspended accounts
- GoodWill110: suspended earlier this week for other match to banned/suspended accounts
- hakiesr: currently under investigation
As before, I don't feel the nameserver match is reliable as a sole indicator of account links - especially for start-up sites. There is buyer demand for these sites and a number of sellers use similar approaches to meet this demand. Some good. Some bad. We focus on the latter and to this end use more than nameserver.
Cool that you're keeping us on our toes but I think this highlights that our team is already doing a lot of work in the space using a range of tools, not just whois. That ebooks such as flipstealth.com even exists should be testament to the effectiveness of the work we're already doing behind the scenes in this space.
Think we don't do enough? How about you take your non-privacy whois matches then do a check on what proportion of these are already closed, suspended or banned? While you're at it, to show we go even further, see what proportion of sellers who are currently suspended/banned that do NOT have a whois match. While you're at it, see what these represent as a total proportion of sellers on Flippa. I think you'll be surprised and see that (a) we take firm action on troublemakers and (b) they represent a small subsection of the action on Flippa.