Volunteer Engagement Portal exceeded power pages capacity

StewC_bff - I have not found an answer yet... I submitted a ticket last month and only just met with someone from Dynamics customer service, but they didn't have a straight answer for me and needed to do additional research. 
This product is similarly looking cost prohibitive for us at $75/mo under the non-pay-as-you-go option for anonymous views and 100 sign in capacity (that could easily grow to thousands). It's baffling that they would design the portal to require sign in to register for engagements, which has very expensive tiers. Unfortunately, we've already invested so much time and resources customizing the product that I would hate to throw it away due to monthly capacity costs. 
Hopefully Microsoft can figure this out and cut us some slack, there's no way it's costing a fraction of what we're being charged to host these portals.