Mapbox's pricing for this would be insane (for a hobby site) if you got a lot of attention... $1 per 200 page loads once you breach the free tier -- though I'll admit the free tier looks generous for a small hobby site.
No deal. I get 50,000 map loads per month for free, and have only exceeded that once. That time, mapbox did give me a freebie because they liked the project.
