Proposal to update the Performance Reward mechanism for single asset pools.

Given the recent market situation, the price of the GROW token has become lower than the performance fee at the current Performance Reward rate (3 / 4.5 GROW per BNB contributed).

We propose to update the Performance Reward mechanism for single asset pools. The new Performance Fee mechanism takes 30% of the profit to buy GROW from the market and returns 80% of the GROW token purchased to the contributor and 20% to the GROW staking pool.

This change will help to support the price and liquidity of the GROW token. It will also reduce the emission of GROW and give more return to investors in compression to the current mechanism.