Thanks Sarah for the article. There are couple of reasons why I wanted to try Checathlon Plus plugin as an alternative to offering a “pro version” of the theme.

I like to experiment and I’ve actually tried it before
I don’t have to maintain free and pro version of a theme
Building child themes also becomes more easy with one parent theme and same extra settings from the extra plugin

House of Learning site is good example of multilingual site that we build really fast (too fast even) using Checathlon theme and plugin combo.

It would have not been possible to build that site in such a short notice without Checathlon.

You can find the child theme in Github.