I am only a member of Paperbackswap.  Are DVDs and CDs swapped on the sister sites for only 1 credit each also?  If you have DVD or CD credits, do they transfer to PBS at the rate of 1 for 1? 

Deborah

1 for 1 at SwapACD, 3 PBS credits for 2 SwapADVD credits

check under kiosk->Transfer credits to see how to do it.

"Are DVDs and CDs swapped on the sister sites for only 1 credit each also?"

If you are swapping on those sites it's actually 1 credit per disc, so a 5 disc box set actually gets/costs you 5 credits not 1 whereas a normal single disc movie gets just 1 credit. Oh and Blu-ray is 2 credits per disc to (I'm assuming) offset the higher cost of those DVDs.

I believe many Blu-ray DVDs are also 1 credit apiece, they just tend to come in 2-disc sets...

All blu ray should be 2 credits per disc.  If you have one that's not showing that way, you'd want to send feedback to the SwapaDVD Team.

This is from DVDs Help Center:

One credit = 1 DVD disc

DVD sets containing more than one disc will earn 1 credit per disc in the set

Blu-rays are worth 2 credits per disc  (my bold)

Each time another member receives a DVD from you, you receive a credit in return.

You then use your credits to request DVDs from other members.

Credits may be purchased in the SwapaDVD kiosk.