[Speaking as a mod] OP, you posted this to seven different communities. I get that you're excited, and I'm not going to remove this post as it's on-topic, but chill, OK? It's bordering spam already, and users are getting annoyed.
[Speaking as a user] I've been watching r/place, but frankly I don't see a point on intervening. Even if you're somehow able to promote Lemmy in it, how much do you bet that the admins will mess with it? A quick splotch of "magic admin pixels" and it's gone. Plus you're still engaging with the platform and giving it pre-IPO numbers.
I feel like effort is better directed towards Lemmy itself.