if you get value from listening to a podcast, return value in the form of money.
that's value for value in a nutshell.

premitive1

Because if you don't support your favourite podcasts they will go away.

If you respect the effort it’s only fair to support it monetarily. Technically any of time/talent/treasure will make a fair exchange

If i understand correctly it means that something is technically free and you just pay or donate what you want. Its an interesting model because if the thing in question is free why would anyone donate or pay anything..

faithandcredit

Same... The page on podcastindex is super vague... I know what "value for value" is though... Perhaps it's actually the same thing.  