This article is excellent. I wondered about this exact issue before. Prograde/forward acceleration only from outgassing from a constant surface just seemed difficult to visualize. It would make some sense for an object with minimal spin since the side facing the sun would heat up more than the rest of the surface and so you'd have an outward acceleration primarily from the rear, but when you're spinning how could the outgassing not also [strongly] affect that spin, excepting some highly improbable scenario where your axis of spin is directly perpendicular to the sun and the 'thing' is perfectly balanced, like a propeller facing the rear of a plane?

I also wish more media ran articles like this. It's fun to let your imagination run wild, apply a bit of math and visualization, and also learn lots in the process. And there's no division. Even if somebody says something completely wrong, people can have fun correcting and adjusting their views like a collaborative project instead of some competition to 'prove' your subjective interpretation right, as so many other topics devolve into.