So that is approximately 1.28 mil classic coins that have not been burned.
So at least $10,000 to $20,000 worth of coins, if your numbers are correct.
The conversion from Gridcoin Classic to Gridcoin POR was announced in October of 2014
Announced where? Not on Poloniex where people were buying it. Between October and March, GRCX consistently traded for over 3000 satoshis, going almost to 6000 in November, and then over 9000 in March. On April 20, the last day of the swap, it was still trading for 4400 before it was delisted with no notice. All of those people buying and selling on April 20 were unaware of the swap.
If those people buying and selling on Poloniex had happened to check this topic on April 20th, what would they have seen? Any news about the swap? I see 4 posts from you on April 20th, and not a single word about all those coins becoming worthless:
https://bitcointalk.org/index.php?topic=324118.4180Maybe the big reddit thread from the same day?
http://www.reddit.com/r/Futurology/comments/335ff1/the_currency_of_the_future_inherently_supports/?sort=newNo, nothing about a swap.