The speed ups available for this event are too high and it makes having a younger account really painful. If a younger account was to spend for the same number of training speeds that you get from this event you’re talking multiple thousands of dollars.
To announce that there will be a spontaneous one in 3 days time right before zenith is completely unfair and a betrayal for young accounts who cannot benefit from the hundreds of days of speed ups that old accounts with the spare research and building speed ups to exchange get from this.
Do NOT run this spontaneous one man’s trash event. The idea to only run it between zeniths is fine. But start it after this one since players have not had time to plan and younger accounts will be profoundly disaffected.