He lied about the value of the PayPal shares he put in. That’s a problem.
If the person who started the company had zero access to capital, then claiming the company had no value at the beginning would be credible. Peter had substantial access to capital even in 1998-99. There was no question he was going to raise a boatload of money quickly after starting the company. Contributing shares of such a company to an IRA by claiming they're worth $1700 is just an abuse of the system.