seems like white-labeled betterroaming (which is ?owned? by 1global).
1global has some infrastructure hardware like ubigi/transatel, someone says it has USA IP when using in USA with 30ms ping... but it doesnt look that cheap


esim is "free" like ubigi - you can keep it installed in your phone.

when you land in different country and use the eSIM, it'll connect to a local network and have a captive portal for you to buy a plan.
dont need to hunt for free wifi or pre-activate before landing

if you don't mind higher latency, would recommend looking for cheaper products, or PAYG ones like roamless/esimplus if you're not in a country for a long time