Yes, I think it should only count games which both start and end in March, but if the organizer would reply with a clear acknowledgement of the concerns and an explanation of why he feels his current format is better, then that’s that.
I signed up when I first read the announcement, having not thought of the loophole (I was actually under the impression that only live games were counted last year, and that the spirit of the challenge was to encourage live games, but I reread last year’s announcement after getting further into this thread, and I was mistaken there), but am now regretting it unless this simple change occurs. It’s not about winning prize money, I was doubtful I’d even go for 100 games, though the badge for doing so was tempting, but it doesn’t feel good to play in a competition which one doesn’t think is fair.