Would you steal a deal from the comments section?
Say you post a deal and someone comments in your deal "you can get this same item or better item for X amount. here's a link". then the person who posts the comment doesn't ever post the deal themselves anywhere else, either because they don't know how or don't participate by posting (only by commenting or voting). Pretend you've done your fair share of nudging people to post the deals themselves as a separate deal but it never happens.
Would you post the deal yourself? After checking it out and it turned out to be an actually good deal, equal or slightly better than your original deal?