https://news.ycombinator.com/item?id=11519085
Unfortunately the original link is down (and I could not find an archived version). But here's relevant material from the comments:
> $18k is a lot of money to spend each month. Understanding the scale of Unsplash though can help explain the costs.
> So at a cost of $18k per month you are getting 30M pages served, 140M API calls, 2.2M background jobs and 143TB of bandwidth. That sounds like a lot of bang for your buck.
> The biggest chunk is the bandwidth charges from imgix. They do appear to be giving you a break on their published pricing, but not a huge one ($0.075/GB vs $0.08/GB). The CDN they are using appears to be Fastly, which also has a published price of $0.08/GB. So, there doesn't appear to be any overzealous markup on imgix's part.