useless as is

Since you can only sync one user at a time, it’s no faster than just going to the target subsite and adding an existing user from the main site or other subsite.

The only difference between using this plugin or adding existing is I have to type a few letters in to choose existing. No big deal, even if I’m adding many and don’t know all their names. I can just keep another tab open with those users listed at the other site that I’m pulling from.

So why do I need another plugin running on my site that doesn’t really add any functionality and doesn’t save any real time?

Give us some sort of function like maybe a limit of 20 users at a time. Else it’s more like a blatant advertisement for pro version.