The higher price allows them to actually get paid for the value they provide to various startups, which - as they pointed out in the blog post - would not exist without these maps.
Of course, the open source approach of OSM with mostly unpaid volunteers is again able to show its potential.
Everyone agrees gmaps has the best data imagery, plus street view - so why not make people pay for it accordingly. I really don't see a problem with this. On top of that people finally receive proper support from google once significant sums are involved.