Electricity rebate

I was very surprised to get an e-mail from what used to be ENEL - got a new name now - giving me what I took to be a rebate of €193. Had to get an Italian to go through all the pages of small print and she tells me it is due to the 4 days I was without electricity when we had the bad snow. This no doubt will apply to a lot of people on this site so look out for it - so unusual to get something back! Having said that I am waiting to see what happens when the next bill is due - they may forget about it!