200K will be the lowest reasonable treshold just in case if you are not ecommerce business. Costs of accounting and audit for high amount of transaction will be too high and CC processing costs are too high for UAE.The way I see it: Dubai never was never the best choice for businesses making less than 200k in NET revenues/year.
Actually, a break-even would be around 100k/year or so but the biggest positive effect would start around 200k/year.
Fro ecommerce business UAE will be uncompetitive any more.