I have worked with numerous people/companies across various industries and most clients rely on us developers/consultants to suggest the SDK or technology to build the product with the hope they would be given a suggestion based on low cost, quick time to market plus ease of maintenance. Corona is ideal for MVPs due to its quick turnaround times
Not all companies have a technical founder or tech person, just delivery folks and idea guys. Corona ticks all the key boxes and has always proven its worth. Everyone who I have introduced it to are very happy with the results and were amazed at cost savings compared to getting the same thing done on cocos2dx or unity2d (they saved enough and made enough that they can easily remake in a new sdk if the time comes). Main focus being 2D games and apps, including business ones. It is definitely used by alot of people and also educational institution as its fairly easy to pick up. It just needs support from the community esp those studios which are doing well using it. Most of my clients are/were on self hosted / priority support as I asked them to
Developers tend to jump to the most popular SDK in hopes of finding work which is perfectly fine but what Corona offers for 2d game dev, I have not seen in any other SDK and I tried a fair few, including unity2d over the past 2 years, once rumours started flying.
We just need to continue supporting it as a community, promote it as best as can, and as someone suggested bounties, paid support plus revenue share based plugins all will help out in addition to core projects people do as freelancers or as studios. It offers everything you can possibly need for 2d games and the extensibility is super easy to 3rd party libs, a fairly complete package.