Just flag it and move on. The user is the PiEEG spammer with a new alternate account; every submission promotes PiEEG in some way even though the URLs go to different legitimate sites. He's built up a really impressive network of accounts and apparently the HN moderators haven't noticed him yet.

christaingmer - https://news.ycombinator.com/submitted?id=Christiangmer

ildaron_ron - https://news.ycombinator.com/submitted?id=ildaron_ron

ron_87 - https://news.ycombinator.com/submitted?id=ron_87

Marat_Japan - https://news.ycombinator.com/threads?id=Marat_Japan

Marat_1975 - https://news.ycombinator.com/submitted?id=Marat_1975

Marat_1975_ - https://news.ycombinator.com/submitted?id=Marat_1975_

Ildarmon - https://news.ycombinator.com/submitted?id=Ildarmon

Add GaredFagsss1 and leisanrain to that list.

You can tell from the fact that 10 of the last 11 postings pointing to the indiegoogo domain are from the above accounts pointing to the same fundraiser: https://news.ycombinator.com/from?site=indiegogo.com