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Also true, thanks for pointing that out. It has it's downsides though in terms of power/heat/longevity tradeoff - at least that's what I've found when mining manually.

No merged mining is basically in smaller words free mining for bitcoin miners. Miners use the same hash as bitcoin with the altcoins/sidechains at little cost to miners.

Many thanks for the inputs. I must read a little more into merged mining. I'd be lying if I said that I know the specifics.