Asking for more in the PPTQ finals, in order to drop.
MTR 5.2 is surprisingly ambiguous about what players can do in the last round of the single-elimination portion of a tournament, but I'd like to mention two examples. Note that this entire post concerns *only* the last round of the single-elimination portion of the tournament.
Example 1: “If I drop, will you give me all your prizes?”
Example 2: “If I concede, will you give me all your prizes?”
Common understanding is that Example 1 is acceptable. (I would like to say that the MTR explicitly allows it; however, the MTR is not explicit on this issue.) If Example 1 is acceptable, then Example 2 also needs to be acceptable. First, because as long as the result is recorded properly (i.e. as a win-by-drop), there's no difference between those two outcomes: final ranking, Planeswalker points, etc. are all the same. Second, because it's not realistic to expect players to understand the line between dropping and conceding – largely because of the previous point – much less be able to walk it.
Note that at the time this policy was originally written, there *was* a difference between a drop and a concession, because the Magic rating system used at the time changed players' ratings differently depending on whether there was a drop or a concession; a concession was more favorable to the winning player. I believe that concessions were forbidden at that time because WotC didn't want players manipulating the rating system through last-round concessions, since a high enough rating meant byes at GPs or even invites to Pro Tours. Now, however, there's no difference; a player gets the same number of Planeswalker points for a win regardless of whether he has an opponent.
In any case, MTR 5.2 really needs to be rewritten for clarification.