I read something about this a while back. If we don't hear something soon, it may indicate they will start doing every 200 days now. But I'm sure if they will give us presents, we'll hear something soon.
Or they have planned to develop 100 day rewards up to 1000 days, but haven't decided what the plan is after 1000 days.
Q: Throcky Any details on the 600 Day vet rewards yet?
A: There will be 600 Day veteran rewards available starting September 8th. We have not announced what they will be yet as we are still working out details. We are planning to having veteran rewards every 100 days up through 1000 days.
Nothing says they are not planning or will not plan 100 day rewards past 1000 days.