Originally asked as a follow up question, and lost in the controversy of Why would it matter whether a front-loading washer is upstairs? (They will only give me a free FRONT-loader if it's on the first or basement floors...)
Why they would only offer it in this way has been speculated about; how it is economically viable for the power company to do this at all, isn't.
The power and gas companies in my area have offered similar rebates and incentives that I would think to be counter-intuitive to their business. Why would the power company offer an incentive for having equipment that would use less power?
My less than educated guess is that it's a 'government thing' or they're somehow trying to deal with demand spikes. But the latter wouldn't explain why the gas company would give you a rebate for upgrading to a HE furnace or a programmable thermostat.