Would you mind letting us know your username? We will check it out for you. If the last time you were active 20 days not 21 days before the payout, it could be possible and in that case we will buy the re-investment contract back.

It is definitely not related to 100% ROI. Many users are way past it, an example: http://www.cmmonitor.com/23-cloudminr.html

Important: The 21 day absence re-investments were for total of less than 5 BTC. We are running a fairly large operation and paying out over 100 BTC every week. This feature is purely for security as some users have reported forgotten private keys and passwords. If the majority wants us to disable it by default, we will.