How was it disingenuous? It is not a 'plug' it is a very relevant link. Being disingenuous would be to say "Hey guys, don't mean to plug my website, but here's my basket weaving blog."
It's a definition thing. In my opinion it's still a plug even if it's relevant (and that's how some other people seem to read the word too here). So just come right out with it instead of doing the "hey not to plug my website but let me just plug my website" thing
I don't think it was disingenuous, I read it more like... "normally I wouldn't randomly plug my website, but given the context, I think this thing I built might be super useful to someone".
