I can't verify its accuracy but someone on slickdeals has posted this apparent response to an email sent to LHW:

Unfortunately, we've had to suspend the sale due to overwhelming demand.
Although we were aware of the traffic volume and made preparations ahead
of time to accommodate it, the volume of traffic nonetheless outstripped
our enhanced capacity. In lieu of the online process, we will be running
an alternative email based sale shortly, as most of the inventory is
still unsold.

You should be receiving an email from us shortly describing the
specifics, but the details you've provided in terms of your intentions
are exactly what we are going to be asking of our consumers. With this
in mind, I'll try to get your request into the queue.

With sincere apologies for your inconvenience,

Robert Cantave
Director of Marketing Technology
The Leading Hotels of the World, Ltd.