I said the parties will have to be organised 'over time', which to my mind suggests not over a single day but a longer stretch. I looked up the dictionary to confirm and the meaning cited is: something that happens gradually during a long period.

Your last paragraph address what happens when parties are held over time, and confirms the system is easy to game, the same person can get a different neuron boosted each time. Thanks for the link to the developers forum, I followed it for some time, it appears Dfinity is aware that the system can be gamed, but feels it is still worth it because the rewards accrue for a short period of time. I guess we will find out soon enough.