Well, when the DNC pulled delegates making the primary pointless and Biden simultaneously pulled his name from the ballot, it would keep and have been a waste of money for a primary challenger to keep campaigning there...

Meanwhile Biden spent campaign funds to drive a "write in" campaign for a literally meaningless election so people would think it was a sign a non progressive could actually still win in NH to make them feel more confident in Biden's chances.

Like seriously, you didn't get that?