According to Adam Schefter, Jets haven't decided whether to trade Darnold or the #2 pick.
https://twitter.com/AdamSchefter/sta...55149860540418
I strongly suspect this is just an effort to build a little leverage for the inevitable Darnold trade. From their perspective, I don't know why they'd keep a QB who is becoming much more expensive and hasn't performed up to expectations, particularly when they're going to be rebuilding anyway. Taking a QB at #2 seems to make far more sense.
Ironically enough, by losing the #1 overall pick, they've increased Darnold's trade value. If they had #1 overall, they'd have an even harder time convincing any potential trade partners that they were planning on keeping him.