Because GHA was stagnant and expensive and multiple services like https://www.warpbuild.com/ popped up, with better performance and much lower price. Looks like they ate enough of GH’s lunch…

Hey, WarpBuild founder here. While it makes it harder for us to communicate this, we're still, we're still faster and cheaper even after the $0.002/min self hosting tax.

Overall costs go up for everyone but we remain the better option.