I'm pretty sure the reason for "the recent Travis thing" is called Idera, Inc.
Microsoft had much deeper pockets, but if people start using GH Actions as free Lambda, basically... the gravy train can't go on forever.
I figure it would be a better medium for GH to throttle CI workflows to something more reasonable, like 1/hour at minimum.
They made 2000 action-minutes-per-month for free for a specific reason. I think they can bare the cost and the potential 'abuse' inhibited by free orgs.