> Some companies don’t pay any differential This is quite scummy unless your role's primary duties are support and nothing else. I would count Site Reliability

> Some companies don’t pay any differential This is quite scummy unless your role's primary duties are support and nothing else. I would count Site Reliability Engineer as support being a primary duty, while I would not count Software Engineer as support being a primary duty. > Some companies only pay out _per incident_ That's a bad incentive. It incentivices more incidents to occur. > One company I worked with paid out per shift of on-call rotation Sounds decent on paper but everyone has their breaking point! > One company treated it as overtime pay Sounds decent on paper but everyone has their breaking point!