I would think that a rolling 30 day average would giver a better idea. I´m not so sure that folks will understand the low numbers at the start of a month. The start of this month would have looked horrible with the two 300%+ blocks, and if not interpreted correctly, may dissuade new members.
You are correct. The very beginning looks negative. However, the days following show the reality of the variance. I feel that if we don't show both sides, the bad and the good, it will be misleading or misunderstood to potential new members.
Most people would not Promote this way, but the transparency of Kano's Pool, is one of the greatest key points he offers. Nothing is hidden, not even the long blocks.
I'm all for transparency; however, promoting the rolling # first makes sense and then providing the MTD # as well would probably be the best in my opinion. This would not only promote the pool in the best light* but also provide full disclosure of the current month numbers.