I'm not sure how Nvidia worked it out with EVGA, but coming down to that price point and the timing of the announcement totally stole the 5600XT's thunder.
Could be - but I think it's a different thing when one board partner (in this case, EVGA) is offering a no-frills variant of the card, rather than Nvidia creating a new model, say, I dunno, 2060 Lite or whatever. Not quite the same impact.
EVGA also briefly had a 1660Ti model down to $219.
But, in this case, Nvidia's in a position they haven't experienced in a while, with an AMD card potentially matching or exceeding in performance AND power consumption for a given tier. We'll see what happens next week when the 5600XTs get released, the test results come out, and the price-war begins for this tier of cards.