As one of several motorcyclists at Verrus, I'll respond to your question...
The motorcycle parking policies vary from region to region, and they're set
by the parking enforcement company, not Verrus.
The good news is that any multi-bike-per-stall policy will be the same,
regardless of how you pay.
However... And I'll assume from your email address that you're wondering
about Calgary, Toronto, or Vancouver, so you're probably parking in Impark
(Imperial Parking) lots... Impark's official policy on motorcycles (I just
confirmed this with their patrol manager) is that one stall must be
purchased per bike. This seems very unnecessary and wasteful to me
personally, and I have pointed this out to Impark. But regardless, that's
their policy. So if individual patrollers have been letting this slip by,
you won't be able to rely on that everywhere. And that applies whether you
pay by cash/credit (ie, display paper ticket) or with the Verrus
Sad but true. If you want to give Impark feedback about this policy, their
main operations number is 604.681.7311.
One nice thing I'll mention about using Verrus with motorcycles though, is
you don't have to worry about people stealing your paper ticket.
Shiny side up, rubber side down. Cheers!