BDIP15 (Formal vote): Defer rewards on BSD/Stable pools until BSD > $1

Chungus on Telegram contributed significantly to this proposal design.

Background: At present, BSD/stable pools continue to emit BSDS, even while BSD < $1. This emission creates downwards pressure on BSD, while not helping incentivize movement of BSD to $1.

Proposal: Align interest of BSD/stable farmers with the overall ecosystem's objective of pegging BSD at $1. To do this, we propose: (1) Pause all emissions of BSDS rewards to BSD/stable pools while BSD < $1. (2) These paused emissions continue to accrue, that is, they will be paid out at a future date when BSD > $1.

For example, we can take block-by-block snapshots of addresses owning LP tokens in the BSD/stable pools. This will allow distribution of accrued BSDS at a later date (similar to the model adopted by Balancer).

Advantages:

1. Reduce downward pressure on BSDS.
2. No loss of BSDS by BSD/stable farmers. They are just accruing for later distribution.
3. Aligns BSD/stable farmers with the ecosystem: Everyone gets rewarded when BSD > $1.
4. Potentially, some BSD/stable farmers may cease LPing due to deferred rewards emissions, which means that there may be less resistance (or costs) in moving BSD towards $1.

Disadvantages:

1. BSD/stable farmers' rewards are temporarily locked up. However, this is no different than the vesting in Sushiswap, Luaswap, and other projects.