I am not so sure about the dev’s intention!
The license is personal but quite permissive, allowing you to run PICO-8 on multiple of your devices in your household (I forgot where I found that phrasing).
If you buy licenses on itch and on steam for example, you should have two licenses, right? But I don’t know if this should hold for a license obtained from the bundle, as the developer does not get paid in that case. I have asked on the BBS, we’ll see if zep answers!