I'm super down voted by open source enthusiasts who want free stuff, but I really think you should charge for this software. It's only going to be used by businesses, so they should pay for it. You wouldn't go to your local McDonald's and offer to work for free for them all day, would you?

Totally understand your point of view. HN community is largely well intentioned and net-net the software world is the better for it. The designer we have open sourced is part of our much larger communication platform (https://sendune.com).