That's what I figured! It just dawned on me that that's the kinda thing that could easily be exploited with a level 100 (because then you get 10,000 per use). The extended moves FAQ mentioned PP in its example (something about a level 50 getting 100,000 total when PP runs out).

Thanks for clarifying, Sunny! I'll be sure not to get too outrageous. Plus, it'll take a while for this loser to raise one.