[WA]

I do not make money from software components, but when I browse http://codecanyon.net, I find a few developers who seem to be doing relatively well. They basically sell more or less sophisticated scripts.

You could regard themes for WordPress as software components. Or theme frameworks such as Genesis (studiopress.com).

The really successful ones (such as Genesis) seem to bundle software components with something like subscriptions to future updates, a paid membership site, additional content like ebooks, live seminars, training, support etc. to get additional income streams and be able to upsell or cross-sell customers.

Game engines or mobile development frameworks (KendoUI, Sencha) that can be licensed also fall under selling software components. Again, the successful ones seem to offer additional resources or they sell their components in a one-year-license model, where customers have to renew the license every year. That would be more or less the same as SaaS in terms of recurring revenue and keeping customers in the loop.