I'm not quite sure about this idea, but i would it be useful for links to work within screach comments. An example of where this might be useful is if someone posted a photo of something and said love these 'whatevers' someone could say, yes you can buy 'whatevers' at and send a link. Similarly i just posted a photo of an infographic i was working on and once i'd finished it i added a link to facebook and twitter and it would have been nice to link it to the photo on screach!
I could see that you wouldn't want people posting offer links etc though as that would devalue the in app offers.
Help get this topic noticed by sharing it on Twitter, Facebook, or email.