A “tier” is defined as the individual distribution layer. Each tier consists of a walletlist, the corresponding distribution percentages for each wallet in the wallet list, and a tier limit for each token. Our UI currently supports tier limits for ETH, WETH, USDC & DAI.
In a multi-tier distribution path, the tier limit for each token indicates the max amount of each token that can be distributed using the given walletlist and its corresponding distribution percentages. Each token has an independent tier limit for that tier.