Are there any limits on API requests? That is, do you throttle the number of requests/frequency? I've seen other providers that do that in an effort to discourage constant syncing of data.
At this stage we don't throttle requests, but the use of the API Key means we can easily keep track of anyone who might be abusing the API.
But if you're sensible about the use of the API you won't have to worry about this at all.