It's obvious to (even) a child why this would be of benefit to Defold, and King. But you're positing all publicity as good publicity for a game.
Perhaps be mindful of a couple of things. There's no acclaim available to a developer or game made with Defold that's going to help sell the game. Defold doesn't have a reputation. It's not that it has a bad reputation, it's that it has no reputation. I say that without gripe, I happen to think this is the best design and architecture of any current engine (with the exception of the horrid messaging concepts and syntax).
King, on the other hand, has a reputation. You might want to think that's a positive reputation, but things like attempting to tag "Candy", a word near and dear to the hearts of nearly every person on earth, do not engender good feelings towards a distinctive brand. Nor are they ever likely to be forgotten.
Further, if you're an ambassador (evangelist?) for King and Defold, don't use passive aggressive nonsense in your wordings to the community of people using the engine. You might take it personally that you've got little response to your outreach, but you shouldn't. You should be more critical of yourself and the company you work for, first.
You might need this explained. "outside of my natural reach" is not a positive way to suggest the existence of the others. And you explicitly avoid listing those that you've approached, but do mention that they’re “selected teams”. The strong inference is that these are teams you’ve selected.
There’s no way for the reader to know if they’ve been passed over in your selection process, nor how far your natural reach is. Most will assume they’ve been passed over, and not bother contacting someone that passed them over, or they’ll continue reading.
Continuing to read reveals more completely ridiculous, deliberate ambiguity and nebulousness.
“…we have a few ideas…” Who is “we” and what are your ideas? Who doesn’t have ideas?
“…how to help AND reward…” help what, how, why, and what sorts of rewards?
“…to ship good games.” Who is the judge of this?
“Our ideas range from… [deliberately vague nonsense] to [even more vague nonsense] , and something about trade shows (what, for boats?) And more…. vagueness.
“We’ve established good relations with some of the teams…” this entire paragraph does nothing more than increase the feeling of isolation from your opaque selection process. Why would anyone submit themselves to being ignored by you, again? You probably want to make this sound like you’re capable of making good relations with developers. Don’t claim it, Prove IT!
And then there’s the King games portfolio. You probably think this is something everyone would treasure… you’d be wrong about that. A few might, but the antics of King’s lawyers and PR department are at complete odds with the joys its games can bring. And most people know this, it’s why most people fear using Defold.
Defold has some equity with game developers because it’s articulated reasonably well, and has an obvious design and attention to detail. But it’s missing lots of the little things that make a normal engine a full engine precisely because it’s been shaped by the explicit and specific demands of a few King games.
You might be a wonderful person, but you’ve written an awful post in attempting to reach out to developers. It’s like a what’s what of what to do wrong in such a post. Especially the last bit, where you finally get around to the point of the post, then give commands on how to approach you, and the rules/reasoning of doing so, then reveal that you don’t really care, just send me a poke or an email.
Make up your mind!
If you can’t be certain about what you and your company can do, how can you positively, with certainty, represent someone else’s game?