We have a few exit nodes already on the network.

Yeah, I also later noticed they charge $46/month for 4 amps whereas the Raspberry Pi 5 requires a 5V, 5A power supply to take full advantage of its processing capabilities and features.

I assume the 4 amps they charge for are at 120 V (480 W), while the Pi only needs 25 W plus some rectifier inefficiency.

Its based on wattage, 4A yes, but 4A multiplied by the voltage. So Pi 5 is 5A, but multiple that 5A times 24V dc and you get 120watts :) so yes, you can definitely colo a pi 5 my friend :D

Good to know. You may want to remove amps from your order page (just leave watts) to avoid the confusion.