The reason for this suggstion is quite simple. I am from Norway (EU) and it's hard to find the deals that are for EU readers (and possibly other continents). Most of your readers are probably from USA/Canada. But I do believe that other people living in EU or somewhere else would prefer if it was easier to see if the deal is available for them.
Splitting the great deals into more subforums or just require posting with [NA] [EU] would probably work.
Splitting the great deals into more subforums or just require posting with [NA] [EU] would probably work.