It seems that you don't track your plugin users at all. Are you sure you don't check the usage status?
In general, even developers like us who don't incorporate a tracking system into their plugins, developers use (a) source code search site(s) to grab the number of users of their plugins to some extent.
According to the information on such sites, this plugin seems to have about 100 to 500 users.
( 2023/August/16, 23:16:43, JST )