I just successfully did 3 CSV exports and the fourth gave a rate limit
error. Seems to work fine.
I did a quick look at the logs, and at least yesterday and today you have
not waited 24 hours between the attempts. It's a rolling 24-hour window,
not a "per calendar day" limit. Also, the rate limiter is requires you to
stop banging against the limit for it to open up (when the limiter denies
a request, it counts that as one request towards the limit). It works like
this so that it completely denies service to robots banging the service
all the time.
- Hessu