Think I may be in the minority here, but I'm going to stick up for the organising company here...
They have offered to organise a large cycling event. We have accepted this offer and paid them some money to do so. They have incurred considerable expenditure - hiring staff, preparing the event, hiring venues, liaising with local authorities, emergency services, local businesses etc. I would suspect that the majority of their costs are already sunk - some will be saved, but I suspect most will be sunk. The weather is not their fault - they have made the only sensible decision possible to delay the event. This is a risk that them and all of us knew was a possibility with any event. They have offered two alternatives to everyone as free transfers. This may not be ideal for everyone, but I think is reasonable.
I've ridden quite a few kilo to go events and overall had very positive experience of all of them. I think the criticisms voiced here and elsewhere are pretty harsh. They are a commercial enterprise, but not a massive set of corporate fat cats. I suspect they will be running at a loss for this event and that we should cut them a bit of slack.
Anyway - that's my view...