Oh, of course I bought Combo Postage! I was checking the steam every month or so during the dev cycle.
It didn't really hit the same for me. Not sure why, but it didn't feel as twitchy as Cardhoard. I haven't tried v2, I'll give that a go now.
Edit: oh yeah, the controls felt really weird after playing cardhoard. Not having a separate key for ground-pound was a really hard adjustment.