I am not sure if this is common in the US. The Aus/NZ standard requires the legs to have support. i.e. it should not be sharp ends. This is to spread the pressure and doesn't sink if the ground is soft.
Of course, it is better to have the one with a support pin as a secondary measure.
another safety feature are these:
1. once the bar is raised, the lever should stay close to the body (see the picture), this is to prevent accidentally snagging it
2. to lower the bar, you need to momentarily raise the bar before the whole bar can be lowered by the lever. This means if the bar is supporting a car, the pressure from the weight would not allow the bar to go up, which means it cannot be lowered. But this also means you need 2 hands to lower the bar(one to pull up the bar slightly and the other hand to operate the lever). i.e.only one hand needed to raise the bar but two hands required to lower it.
https://www.bunnings.com.au/kincrome-18 ... lsrc=aw.ds
IN Australia, if a business does not use a compliant tool and result in serious injury, the business owner gets jail time (not just a fine). But homeowners can use what they want.