We've already seen the effect of DEC sales. It is nice, but it didn't make a huge dent. This would bring value to the RW set as it stands, while still reserving a decent amount for "the vault." 10% seems like a good estimate to balance future demand and supply based on the sales to date and expected sales throughout the burn. There is definitely an incentive for the DAO to allow the company to move towards a better release schedule with improved sale mechanics.