I checked their official donation channel is OpenCollective. I think the Bitcoin address is no longer being used and they just forgot to update the footer

▲

a day ago | parent | next [-]

[deleted]

▲

philipwhiuk a day ago | parent | prev [-]

Yeah, someone probably deposited an amount a long time ago and it's sat there earning interest.

	▲	benenrjdnz a day ago \| parent [-]
		Bitcoin doesn’t pay interest. And that’s a good thing.