Users can supply their assets to increase the liquidity of the Variable Rate Pool. There will be a Variable Rate Pool for each of the assets supported by the protocol. The role of the Variable Rate Pool is to provide immediate liquidity to any Fixed Rate Pool as required, ensuring that demand for new loans is satisfied. This is the mechanism Exactly protocol has to match credit supply and demand. When a new deposit is made in a certain Fixed Rate Pool, it replaces the prior contribution of the Variable Rate Pool to such pool. In turn, the Variable Rate Pool retains a small fraction of the interest fees as earnings for having provided liquidity in the first place. That way, the Variable Rate Pool liquidity is continuously reused to match the demand for new loans and afterwards released in exchange for a fee, ready to be used again for future loans. The rotation speed of this dynamics plays a key role in the profitability of the Variable Rate Pool. The faster the rotation, the higher the rate it builds up.