> it makes me happy if people can make a business using a bit of my work

It's an idea as old as any:

The freedom to restrict the freedom of others, is it really a freedom?

It is a tiresome debate. People can argue about it until the sun sets without reaching an agreement. Better to be clear about which kind of freedom you mean, and respect the choice of others.

Plenty of businesses have been started around free software without necessarily restricting the freedoms of others. It is often argued that this constitutes a better approximation of a truly free market than the entry barriers intellectual property law can put up.