The $FPIS snapshot occured on February 21st, midnight UTC at block height 14246086. The resulting eligible addresses have been posted to github (link), with claims available preceding system release at a later date.
The airdrop will be weighted as such:
veFXS holders will receive 1.0 units of airdrop weight per 1 veFXS
tFXS holders will receive 1.0 units of airdrop weight per 1 tFXS
FRAX-FXS Uni v2 LP stakers will receive 0.5 units of airdrop weight per the boosted balance (timelock boost) of the account's FRAX-FXS Uni v2 LP inside the staking contract. Note that the tokens must be staked inside the staking contract to be eligible for the airdrop.
Note: for Convex cvxFXS depositors, users will be able to claim their airdrop through Convex at a later point after the airdrop is released.
Say a given user has 10 veFXS, 10 tFXS, and a Uni v2 position of 5 FXS against 125 FRAX.
10 veFXS -> 10 airdrop units
10 tFXS -> 10 airdrop units
5 FXS against 125 FRAX in Uni v2
Uni v2 LP tokens
25 Uni v2 LP tokens staked, no timelock -> 12.5 airdrop units
25 Uni v2 LP tokens staked, 3 year lock -> 37.5 airdrop units
If the above user chooses not to timelock their Uni v2 stake, they would receive (10 + 10 + 12.5 = 32.5) units of the $FPIS airdrop.