Early developers pre-mining coins during development, coins need to be mined to test that the altcoin actually works but it's really unfair if the developers st

Early developers pre-mining coins during development, coins need to be mined to test that the altcoin actually works but it's really unfair if the developers start off with a ton of coins because they mined blocks before it went public. Satoshi did this but I don't think any of his BTC has ever been moved from his wallet.