Yeah, we literally used it as a stripe proxy and to serve frontend. All data was served in stripe and then queried using Stripe Sigma, their flavour of Presto.

Can tell you the total cost from RTE does Comic Relief, which was the same size, was about 16 euros to host the whole thing. This would be about the same, however is on RTE's cloudflare account, so not easy to get breakdown.

Workers were just a good fit not to have to host anything, due to the unpredictable number of donations that we would be getting through. Deployment and development is also really easy.