You are obviously free to use whichever mod you feel like in your own games. Please note that the original is MIT licensed - I could charge for access to this mod, and the original author has expressly consented to that. Instead its here for free. What a rip-off.
As noted above, I made this as a convenience feature for myself, and shared it so it could be convenient for others, too. When https://mods.factorio.com/mod/blueprint-sandboxes became available, that was even more convenient, so I no longer maintain this. Note that I've kept the MIT license, even though my typical go-to license is GPLv3. Among other things, that means you can take this freely available work and charge for access to it, provided you still credit me. Such a rip-off.