I heard back from the Canadian CC processor Moneris and their fees are 1/3 of Stripe's. So if your open source project (especially invoicing, LMS, membership site, etc) can integrate with Moneris with little work on my end, I want to know about it.
Boosts for visibility are greatly appreciated.
https://www.moneris.com/en/solutions/ecommerce/moneris-gateway