This is a followup to this old thread: Tiered Rate Account
In proposed advertising, marketing wants to avoid listing all the tiers with their corresponding thresholds and APYs and just show the LOWEST
tier and mention that larger balances earn higher yields. (I know, normally they want to just list the highest APY.)
I have looked through Reg DD and it does not seem to provide any safe harbor for advertising just the lowest tier and lowest APY.