If they compensate for missed trades due to service outages, then an attacker could take a position, repeatedly DDOS Robinhood until the position is favorable d

If they compensate for missed trades due to service outages, then an attacker could take a position, repeatedly DDOS Robinhood until the position is favorable during a DDOS, and then demand reimbursement since they "would have" cashed out that favorable position. It follows that Robinhood must never reimburse for outages.