In the days where pretty much every recent device supports esim and so many esim providers are out there I see very little benefit to a cable that has a built-in hotspot limited to 4G, 2.4Ghz Wifi and only 2 devices.
They seem to have very limited packages for a pretty expensive price, looking at my latest esim purchase - 10$ for 5GB North America for 15 days (I needed both Canada and Mexico), they charge whopping 79$ for it, even at 70% off that's still more than double.