How receptive your CEO would be to an idea from an unknown employee is very much dependent on your company's culture and your CEO's personality. I think that the main risk would be not from the CEO (who would probably just ignore your idea if they thought it was worthless), but from your manager, who might be upset that you didn't get their advice or approval before approaching the CEO. It would be hard for someone who isn't familiar with your company's culture and politics to give you useful advice, so you might get a better answer by asking a co-worker in your company who has been around longer than you have (and who you trust to be discreet).

Also, a six-figure income stream may not be worth the trouble for a business that's big enough to employ thousands of people (I'm guessing at least hundreds of millions of dollars in revenue). It may seem like a lot of money to you, but it could be a drop in the bucket for the company and a distraction from their core lines of business.