Be careful, I have a friend pretty high up in one of the largest media agencies in the asia-pacific. He is saying clients are cutting back on advertising spend in a big way, forecasts are not looking good. TV and magazine media is down year on year in a big way too. People preferring to go on the net, not to mention people do not engage much if at all with ads on the net.
In my opinion.... Commission jobs are good if they: - set realistic goal - you have the skill and motivation to succeed - the industry is doing well - the macro economy is doing well - pay well
I'd negotiate some sort of a base if I were you, macro economic and advertising industry forecast is not looking good. Hope this helps.