A remix for your idea would be a "website factory": You take ideas, build a version 1.0 website, then sell it. Plenty of people would buy it, and try to compete based on marketing. Many people who go into business view the world as nothing more than:
mediocre product -> loudmouth marketing -> profit
You can also then charge maintenance fees and feature requests. This would be better than charging for ideas because words are abstract. You tell a great idea to someone, they design the product/service in their heads, and then tell you all the ways it won't work. This happened to Google, VLSI circuits, HP and the Alan Kay's recommendation for the netbook in 2004, etc.
Creating a v1.0 or working prototype lowers the chance people will misinterpret/mis-design the idea in their greedy brains. The people dumb enough to pay for ideas are the type of people who avoid anything technical. So they would definitively pay since you are taking away their #1 annoyance: product design and implementation. Then they can focus on what they do best: loudmouth marketing.