Pete built the Fantasy Movie League Lineup Calculator. In July it got about 30K pageviews, resulting in a $0.21 bill from Amazon AWS:
The Lineup Calculator is comprised of a set of AWS Lambda functions. Boiling what I’ve done down to its essentials, I’m using Lambda as a free batch server where I’m well below the free tier of 1M transactions per month and using S3 as a low cost web host where my primary cost is the egress.
At work we’re also heavy AWS users. Some of our projects – like the haroon.be meme generator – run using a likewise setup: static (and generated) files are stored on S3, with some Lambda sprinkled on top.