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Around a similar time Mapbox also made their pricing much cheaper for lower usage users.

Current Mapbox pricing came into effect July/2017.

Ah yeah I say similar time because I don't check it too often but the pricing used to be: free, $500/month, and "contact us"

Not Mapbox, but MapTiler Cloud lowered the price recently - https://www.maptiler.com/cloud/plans/