Re: But when will there be any free cycles?
With over a billion PCs worldwide, around 3/4 of those having AV installed, Norton holding (at a guess, as Avast alone covers this) 1/8 of the market, let's use simple round numbers and say there are 100 million PCs with Norton AV products installed.
If a bog standard PC takes two years to mine 'an' ethereum, and each PC is switched on for just an hour a day you're looking at over 5000 ethereum a day, or $11m/day pretty much pure profit.
I can see the attraction to Norton.