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That's why I made the question, and asking if it's feasible for any Exchange site. I will remove the "no free" part of course, but they won't fit the bill. I tried them all recently, and just no. The addons are horrible, full of security holes and bugs. And once you pay, you won't ever see the addon writer again. No way to contact him. Hiring a programmer just for this? It would cost more than a whole E-commerce app.
I tried to do a research on my own (after the linked in wiki entry), but it's really hard. That comparison chart is really outdated, and the comparison tables are cluttered. I know they won't give me 100% correct answer which I can just buy then or install. But this is what happens with every software. "Which software let's me remove duplicate files." For example. Let's say it's a commercial software (which does this), but it does it really well. It gets upvoted, it gets accepted.
