My last several jobs the extra pay has been a small phone stipend, and perhaps a very small token sum (maybe $50 for the week).

The only time I made significant money on call was early in my career as a contractor.

Yeesh, I get more than that per day. I didn't realize others had it so bad.

Nope. Amazon, for instance, has their engineers on call in a variety of roles with no additional pay.

Salaried tech employees do not get extra pay for being on call, generally.