I understand why they have re-scheduled existing ticket sales. They want to keep the sale, and it's more likely to be kept if there is an actual date attached. But I think that selling new tickets this month for a performance at least 8 months from now seems premature and may cause more headaches than it's worth.
I would agree that I can't see them insisting on "no refund" later. Either things will be normal-ish, and the show will be a hot ticket and easily re-sold, or things won't be normal-ish, and the show will get postponed again.
The interest accumulated over two years on several million dollars of ticket sales is non-trivial. Does anyone know who gets that interest - Telecharge, the theater owner, or the show producer?