I had a game with the Krynn where this happened, about half of the techs I researched in the game got creativity boosts. First game with TOA and it helped me fight off some unusually aggressive Terrans (they conquered the Drengin early, but maybe it rubbed off on them...). Since then, however, it hasn't appeared nearly as often even when I research or trade the creativity boosting techs.
I don't know if luck interacts with it: +50% luck from bonuses and parties hasn't helped my Arceans in this respect, but practicing with luck/first strike/weapons boost combo on huge fleets of tiny ships at the moment and absolutely astonished by it. Not a single ship lost yet against comparable Korx & Krynn fleets of smalls and mediums. The Arceans' 10% bonus to creativity from one of their techs is handy too, activates just often enough to keep my weapons up to date. I rate these cheap, wonderful bonuses higher than almost any other these days (though I find I always take 1-3 of the holy trinity of econ, morale & pop growth, otherwise I can't keep up with AI).