I'm not sure what to do for an exit strategy if I can't order anything through PPDG. I was going to Best Buy, but now it seems that GS is the only way to go and they don't sell Disney. hmmmm.....
Worst case scenarios:
You could always sell the GS GCs to a reseller site for about 82-85% of face value (which is what GS usually goes for) but receive it back in cash.
You could see what GCs GS does sell, go to giftcardgranny to compare which has the highest resale value, trade your GS for that card, and resell that card to recoup a better percentage than above in cash.
You could convert GS to eBay, use the eBay credit to buy something with a high resale value (like a new iPad or MacBook, which I see go on sale frequently) during a Bonus Bucks promo (to get those Bucks and offset any eBay selling fees), then turn around and sell that item back on eBay or Craigslist for cash.
If your GS does not accept GC-for-GC, you can buy something with a high resale value (like a game console), sell it on eBay or Craigslist, and cash out that way.
With cash, you can take it to Target or Raise>Target, and buy Disney GCs with the 5% discount.
The point is, if you can liquidate your GS, BB, Sears GCs to cash at close to a 90% value, the Target REDCard discount gives you another 5%, and possibly more with Raise et al., so you won't lose too much at the end of it (and hopefully you'll have churned your funds a few times and made some profit).
(ETA detail.)