There is also a possibility that Rocketpot simply do not have the appropriate funds and are buying time in order to cover the payout. If that is the case then it means this issue will go on for an extended period of time until Rocketpot folds and ceases to trade or if their income drops as a result of less traffic at their website. After winning a huge amount it is something the OP would have not wanted to happen.
Credit to Rocketpot though but they have yet to confirm they will honour the full $170,000
Still, I must say that I am really envious of your profits, especially since that the market drop we are experiencing will significantly increase the amount of ETH you are about to receive. More importantly, using a hardware wallet for storing your funds will definitely give you a good night sleep -- just a reminder.