Ok, I made an error... PTS holders get 525,000,000 Notes not 450,000,000. So the correct math is:
1 PTS = 298.647044 Notes
Current price of PTS: 0.01176360 BTC
Current price of BTC: $300
$1 worth of PTS = 83.1885916 Notes
Therefore, each day between now and the snapshot, there needs to be over $60k in BTC donations to justify holding PTS rather than selling it for BTC and purchasing via presale.
5,000,000 Notes / $60,104.3954 = 83.1885916