Unfortunately I'm pretty certain that hard core abusers (we all know who they are) will evade it using various round robin combinations of accounts, as well as stake moving (which can be done invisibly every 13 weeks, which is probably enough to stay ahead of detection, almost entirely if not entirely), while innocent non-evasive users and valuable contributions which should be perfectly legitimately be consistently rewarded over time will be caught by it, so I can't support the sorts of ideas I've seen proposed, but I can't rule out there might be others that could work.