I've read about Yoona making 3,5 million dollar first half of this year..
Of course she's done Love Rain, tons of cf's and she's still getting royalties for cd sales.
She's probably the richest in SNSD, but if she makes 3,5 million half a year, the others should at least make a million.
They're not poor you know haha, some people like to spread rumors of SM not paying them well, but they don't need to complain I guess.