I think it would be nice if there was some kind of Developer Certification from Defold/King you can achieve.
I happen to know a lot of people who love to get as much certifications as they can. They put these certifications on their LinkedIn profile and such. This way more people will know about Defold as well, which is also nice!
For example there can be three kind of certifications:
Basic Developer: You have a form with a lot of multiple choice questions. Once you have achieved x% from 100% you are a Basic Developer.
Once you have enough experience you can apply for the Advanced Developer and the Expert Developer Certification. These can also be achieved by questions, activity on the forum and of course the time you’ve worked with Defold.
Just throwing it out here!
Here are some examples of existing ones:
https://www.mendix.com/blog/become-mendix-certified-developer/
https://certification.unity.com/
https://developers.google.com/training/certification/associate-android-developer/