Could we just make this Infinity?

We could, but I removed it entirely from calling this function to not have the delay of an async http request to the durable. Also, keeping infinity array size of timestamps might hit Limits of durable object

Makes sense...but...personally I would rather special case "Infinity" as a "limit" than a specific gateway. Maybe in the future we'll have other gateways that do not limit, if that happens we'll have to change code somewhere else than here and I'd rather just have a single place where we define the available gateways and their characteristics rather than scattered.

Unless the additional async request is problematic, I'd keep it there. It also makes the race a bit fairer.

fair enough

Made 10 seconds the time to track, so that we do not have a really big array to track