I still believe Stringify gave up on a much larger audience/userbase when they agreed to the acquisition of their company.
Home automation is still in its infancy, and with an abundance of devices and hubs in the market, ease of use to make all this hardware/software work together can seem daunting for new users. Stringify was the bridge. With some time, marketing and the right resources Stringify could have been the "it" app in home automation. Sadly, startups require investment to realize what was probably their dream as well when the company and vision were formed. An acquisition ends up being the most viable option.
Had they considered a monthly fee (free trial for new users), I most certainly would've been a lifetime subscriber.
To the team that built Stringify. Thanks for all the hard work on making what I consider and will in the past tense, one of the greatest apps in home automation.