Yes, for all of March. Then, for the next 11 months, we will get no front page exposure, we will be relegated to an off page.
In another game I play where we've managed to win the MPOGD.com game of the month twice in the last 4 or 5 years, we saw an influx of members immediately after the win, but in those month in which we were not eligible to be voted upon, our number growth was down. When we made a consistent effort to remain in the 2 through 5 spot, our growth was marginally up from the mean.
In the end, it is just something to be considered. Since this is an 'experiment' for the site. If we win, we will get top billing for 31 days. Then we will be hard to find on the site for 11 more months. We won't be able to 'do it again' for 1 year. So the experiment will not hold as much value in exposure, in my experience.