Not only is that not true. The founder of Bitcoin even took the additional steps of proving in the genesis block that he did not give him/herself a headstart. In fact, even that block containing the proof itself was made inspendable on purpose.

did they make the first million bitcoins they mined unable to spend? No founder reward means no mining so it is very true, there was an advantage, the crytokitties creators are not allowed to breed kitties, but take a cut from every sale which is more fair

What's funny in bitcoin, of course, is that none of those coins were sold, nor were they offered for sale.