So far, "premine affects adoption" theory has seen zero confirmation in actual reality.
Now, shitty code and ill-constructed diff adjust, those will leave a dent. Or two.
Well you have no idea how much premining affected adoption of your coins. I like some of the concepts but once I learned of premine I lost any interest.
Sorry nothing personal against you (or any developer or any chain) but I don't believe any currency based on not needing trust while at the same time including a premine thus needing to trust the owner/developer will do the right thing.
So premining does affect adoption (at least somewhat) HOWEVER I can say personally
"having internal obfuscated wealth transfer mechanisms is far scammier than a premine".
Maybe at some point in the future premine can be done in such a way that doesn't rely on trusting an individual. Some innovation where coins are held by the network in aggregate and issued based on consensus of hashing nodes to developers, bounties, and non-profits. Until that point premines are a non-starter. The larger the premine the larger the non-starter.