The article is very light on any detail at all... but it implies - in several places - that this Bitcoin mining company is building generating capacity where none existed before. However the Olkaria Geothermal station at Hell's Gate was set up in 1981, and has had multiple expansions since then - none of which were apparently funded by Gridless (they aren't even mentioned in the Wikipedia article - as of this moment). And does anyone believe Iceland needs Gridless' "help" to develop geothermal energy?
It seems to boil down to the old, specious argument that Bitcoin miners have tried to shill in the past: "we create demand, which encourages the build-out of extra capacity - some of which may serve other non-Bitcoin uses".
But basically Gridless is a leech, like every other Bitcoin-mining outfit. They're just claiming they're less of a leech than most other Bitcoin miners. Why the vapid "reporter" didn't ask the obvious question is beyond me - "So as the non-Bitcoin electrical demands at these sites grows, do you plan to permanently shut off those mining rigs?"