The Double Up Drive is an opportunity to have donations to many effective charities matched. In the past, posts have been written on the GiveWell blog and the EA forum (e.g. here and here) discussing problems with donation matching. However, the Double Up Drive seems to allay the majority of these concerns with their statement that the matching funds will only be donated when others donate, and the large number of charities that they will match. On balance, is it best to participate in the drive to put the matching funds to good use, or not to participate in order to avoid some of the remaining problems with donation matches?