I read that the amounts raised by it are tiny & barely worth the hassle to the receiving charities
The person who made me aware of it was a recipient charity. They described the funds as a “steady trickle.”
To my mind, it’s the sort of thing that might benefit smaller oft-overlooked charities. The one I’ve nominated is the Lancashire Women’s Centre, it’s a local affair which provides support for women in trouble – so, homeless, domestic abuse survivors, recovering addicts, that sort of thing. They offer support, debt management, safe places, general advice, a load of other stuff. I did a sponsored run for them a couple of years back, raised a couple of hundred quid for them (with support from the lovely generous people of STW at the time) and when I gave them the money they reacted like I’d just given them a cheque for half a million quid. They enthused at me about exactly what they could use it for and how it would make a massive difference, I think that’s a far more useful application than a big national charity where anything less than tens of thousands will be a drop in the ocean.
https://lancashirewomen.org/how-you-can-help/donations