Originally Posted by
Top Tier
Plats and golds earn free upgrades at a 20% rate (2,000 out of 10,000 miles).
An exp with a 50% upgrade success rate is earning 2 1/2 times as many free upgrades as a plat or gold. An exp with a 100% upgrade rate is getting 5 times as many free upgrades. Unless your success rate drops to 20% or less, you are getting more free upgrades than any plat or gold
You can't link the two stats, one is an earning rate while the other is a success rate. As we all know, just because you earn them does not mean you can use them........