So based on your deep analysis every new Twitter accounts look "spammy" because they have no tweet? It will look like any other account where there is promoted content (promotion ≠ spam) and all the tweets will be related to an overall topic (as described above) — the meaning of the handle — therefore making it worthy of attention. And who said I will not engage with the followers? It won't just be promoted tweets, I will myself use the accounts, I just need a reason to.
What's your secret to getting Twitter to hand the accounts over to you?
When hoarding becomes a business that's called investing so domain investor will be more appropriate.
Twitter didn't hand these accounts to me.