I run https://www.instantstreetview.com which does 100,000+ 'map loads' per day. The price for these has effectively increased by a factor of 28 ($0.50 -> $14 per 1000), which is completely unsustainable ($1,400 daily!)
We'd be happy to talk about a much more reasonable cost. :)
Please email if you're interested: luke@stadiamaps.com or take a look at our website https://stadiamaps.com
They attempted to shoehorn me onto the premium plan but many aspects of it are geared toward larger entities - very steep initial cost (per map load) with discounts for huge volumes.