Earn
Providing liquidity here normally means choosing a bin range and holding a position spread across dozens of them. A vault does that for you and gives you a single transferable token instead. Swap fees accrue into the position itself, so the token is worth more over time — there is nothing to claim and nothing to harvest.
The vault takes no fee. The protocol already earns its capped share of every swap this liquidity facilitates; charging again for supplying it would be taking twice.
Reading the registry…