Definitely not just a gimmick. It's aimed at smaller contractors imho.

I bought my first house in the UK less than a year ago. I ripped absolutely everything out. For weeks at a time I had only 1 working sink, with 1 working electrical output. During this time I had local contracters in to deal with stuff I either didnt have the time, expertise or legal certifications to manage myself. Barring a carpenter, every single one brought a makita radio/wifi unit, and every single one needed to leave the house to get hot drinks because the single socket could not safely take more devices plugged into it (chargers on an extension), etc.

Contractors I had were bringing their coffee in thermos until they were able to connect a kettle.

UK: Birmingham, we have a lot of building going on at present or starting very soon in city centre and in the Commonwealth games site.

Large sites: portakabin with microwave & fridge and kettle and hotplate and fixed tables usually

Interorior refurb in larger office and showroom buildings: again part of a room set up for breaks.

Smaller house extension jobs: this could be the market.

As another poster points out probably a novelty/freebie for sales purposes.

Could be for companies with one of those buddy contracts for buying equipment from one place alone.

In AUS I can confirm that the cafes nearby to large construction sites always have a steady stream of hi-vis customers, many of them taking trays of espressos back to the worksite.

what and supply their own biscuits? This will never catch on!