Chris Lema has started an engaging conversation around the topic of plugin authors not charging enough for their plugins. The main take away I have from his article is that plugin authors are under charging for the value that their plugins provide. But after reading the comments, I think most people are of the opinion that single site support licenses for plugins such as GravitfyForms are in a sweet spot but for the developer tier of licenses, they are severely under charging.
As a consumer, I don’t want to see plugins like GravityForms bump up their single site licenses to $100 a month or $200 a year. I think plugin shops should definitely charge a premium for their developer license packages because the consultants are the ones making the big bucks and end up passing that cost onto their clients anyways.