We are not asking for payment for prayers. No one can pay for prayer or Torah. We are collecting donations for families involved in Torah-learning as well as the Torah-institutions for whom they learn. In gratitude, we will go to great lengths to help your prayers get answered. As your donation increases, the number of families helped by your donation increases. So does our level of gratitude (although every donation is truly appreciated!) and to show our additional gratitude, we increase our efforts to elicit divine assistance for you.
Praying 40 days means that your shaliach (agent) commits to being in the Old City of Jerusalem for 40 consecutive days. They cannot go out of town, not even for Shabbos. It also means that during their hectic schedule of family, learning, mitzvos and other, they remember daily to make that journey to the Kotel, regardless of circumstances, and focus on your needs.