Did a quick search and "Trader Joe’s and Walmart employees have received bonuses, while Target, Whole Foods, Amazon, and the Texas grocery store chain H-E-B are offering $2 per hour raises."

https://civileats.com/2020/03/20/breaking-grocery-store-work...

May also be coming to doctors, nurses (if it isn't there already):

https://www.cbsnews.com/news/trump-says-administration-looki...

Customs workers, corrections officers, and a ton of other jobs also negotiating it. In Philly, among them are police, firefighters, sanitation workers, health care workers.

https://www.nbcphiladelphia.com/news/local/philadelphia-to-r...

Typically, very few industries are exposed to enough uncertain risk to warrant it. It's meant for workers who are exposed to an unusual level of risk compared to the job typically. The typical risk profile for delivery workers is robbery or animal attacks. I think it's reasonable to say that being exposed to people who may be carrying a deadly disease is unusually hazardous. Especially in cities with a stay at home order.

The military offers a number of different pay scales for this, but I'm reading an extra $225 per paycheck tax free. https://militarybenefits.info/military-allowance-incentive-b...

As for "who typically offers this" I would argue that this isn't quite like a "normal" time. Many people are putting their health on the line to come to work which is not something that is normally part of the decisionmaking process for their regular wage. As a result of that increased risk and because of the huge demand for their labor a large increase in pay makes a lot of sense (even if we take the "combat pay" stuff out of the equation. Demand-alone would increase their wages)

$225 is for hostile fire/imminent danger. Hazardous Duty is $150. I'm not sure which one is more appropriate.

In Canada, most grocery chains have implemented +15% pay increase for all working personnel during the Covid crisis.

You can see the monthly rates here: https://militarypay.defense.gov/Pay/Special-and-Incentive-Pa...