It’s the network’s rule:

Kennedy has already hit CNN’s 15% polling threshold in two out of four qualifying polls. But the network also announced that participants must “appear on a sufficient number of state ballots to reach the 270 electoral vote threshold to win the presidency prior to the eligibility deadline.”

I think as a bare minimum requirement, being able to appear on the ballots of enough states to actually have a chance of winning makes perfect sense as a rule. With all the things to shit on the parties for, why make up a strawman?

Monopolies for modern necessities (the internet and phone) don’t have to worry about customer retention.