Why? OP gave you a list and a fairly non bias summary for each. Besides, using their site is completely optional and based on volunteerism. If you think it was of poor character, don't use their site.
Is mentioning they run the site necessary? Absolutely not IMO.
I thought it was obvious at first glance he'd be promoting his own site anyway; his username is 'sideproject'.
Personally I think it beats Show HN: Sideprojectors, which was his alternative. I saved the list in my notes. Thread was useful to me and good advertising for him. Win-Win.
I literally* don't understand how people mess this up. If you were talking about a list of projects that had not yet been submitted to one of those lists, would you say they are "non-submit"? No, obviously you would say "non-submitted". If you were talking about books that had been printed by a publisher, would you say they are "publish"? No, you would say "published", because it's a past participle, and that is how we say past participles in English. This is not a prescriptive/descriptive thing: every English speaker over the age of 5 talks this way. But for some reason "bias", a completely normal verb, causes people to throw out everything they know about English.
People get this wrong because with many accents (most American regions among them) the "ed" in "biased" is almost silent when spoken aloud at conversational tempo.
I consider lip-movement during reading a mental disorder. It means your cerebral cortex is connected to your motor cortex in a flawed way. It's a significant 'brain wiring' issue, and would severely limit how fast one can read as well. It's not as bad as "mouth breathers" but close.
Is mentioning they run the site necessary? Absolutely not IMO.