What makes you think putting data on the Internet all the sudden means I unilaterally surrender the rights to my intellectual property?

If I choose to make my data available to some businesses to make discovery of it easier, and I choose to decline to allow others to unilaterally copy my data to develop a different business, that's my right. And it is unethical and unreasonable for any other person to assume otherwise that they are entitled to the same rights I granted someone else.

If I own some data, I get to the be arbitrator of the who/what/when/where on the use of the data. Period.