I have a charger already at home (apartment garage had them when I moved in), so I took the EVgo credit even though there are 0 EVgo stations currently in Wisconsin. Email showed up a few days after purchasing my Solterra. Credit went through without issue.
I did find even though there are no EVgo near me, you can use them on their partner networks including ChargePoint which there are several where I have been. However, the EVgo app could not activate the charger - but the EVgo RFID card did work to activate the ChargePoint chargers.