Does anyone know of or use an event management module that integrates with Marketo, does not take a cut for unpaid events and accepts payment through Moneris for paid events? Please let me know. We're struggling to find something that fits our requirements.
I don't know of one with those specific requirements, however all of the integrated partners are on launchpoint.marketo.com e.g. Events & Webinars Marketing Automation Solutions – Marketo LaunchPoint
Yes, look there. Eventbrite might be a bit closer to what you want than Cvent or some of the major tradeshow management tools.
You can also just use Marketo to manage everything up to the payment. When it is time to pay, send them to the payment page. Change their Progression Status to "Pending Payment" and then update with a list after they pay.