Re: Ratings are approximate
I think it's economics. They will go where the money is if a higher tier is close enough to justify the travel cost. Guys like Climo need to know they are going to cover their costs even if they have a bad event by their standards with everything won beyond that as gravy. A motel room is going to cost about the same whether it's a C-tier or an A-tier and many locals enjoy providing free lodging for the travelers so an A-tier might even be cheaper for expenses.