The bridge fee depends on the user's pool share (amount of xABR). In the beginning, when the staking pool has less liquidity, the user needs to stake less ABR in order to reduce the bridge fee (less xABR is needed). As TVL increases, the user needs to stake more ABR in order to keep the bridge fee on the same level. For example, if TVL is $100,000 and the user stakes $100, the bridge fee will be reduced to 0.04%. However, staking $100 with the TVL of $1,000,000, will reduce it to 0.19%.