Unless you have individual insurance you don’t get a dime. If you are under an employers plan your employer gets the money back, not you personally. That’s why the $1.3bn is going back to only around 16m Americans, if you aren’t a corporation or a small business owner or someone with an individual plan, you are not getting a rebate. But for those that do get rebates–congratulations, you made an interest free loan to the multibillion dollar insurance company that you buy health insurance from! You can also expect that as the years go on health insurance companies will get better and better at making sure fewer and fewer dollars fall under this requirement.
Now that I think about it, a lot of the people getting rebates are probably Republicans, since this money will disproportionately be going to people like small business owners, or corporations (which aren’t human people at all.)