DP should add Escrow services for Buy Sell or Trade section of DP forum, so buyers are protected from unscrupulous sellers whom offer services who don't perform by delivering the download files which DP buyers have paid for.
It just comes down to this... If people already have the ability to use very good escrow services, and they don't... what makes you think they are going to use one that probably wouldn't be as good (or as cheap) simply because we offer it ourselves?
I was referring to escrowing payments like Freelancer.com provides that's actually within DP, not an outside Escrow service provider like you mentioned. It's a complete waste of time to go to another website outside of DP to escrow monies. Don't you think?
Why would that be a waste of time? Do you go to Google to do a web search, or is that a waste of time?
Skrill also offers escrow service and it is relatively cheap, try it out. Though you need to have an account with them.