A smart coder would use code obfuscation and hide block rewards at start, and then promise on certain days there will be significantly increased block rewards.
But, you know, we need an actual competent programmer to figure that one out. Which this community has zero of.
No that is work. I know there are PLENTY of people here that could do something like that. On the other hand that is work, and when you still got tons of people still falling for the copy/paste BS and making only early adaptors with mega hash power+ devs rich beyond we all could imagine for a simple 10 minutes of work.
Dont get me wrong there has been some interesting concepts recently, but in reality 95% of the coins in the last month are nothing but pump and dumps.
I do think one coin at least when I was first active, Americacoin or something like that did try and it failed. I think that was because the dif got so high before the blocks started to reward.