like-minded individuals could suggest cards to each other.
There are already two mechanisms built into iStripper for that
Posting to the forum
Using the individual cards' comments and rating system
For all of the reasons outlined in the thread referenced by
@JayZ971 I believe that Totem will never provide either a trade in or a card swapping system, there is simply nothing in it for them. Possibly if users offered to pay Totem to take back cards they don't like rather than asking Totem to pay for the returned cards they might see a benefit - but then why would any users do that ?