Hello! And thank you for your answers.
I have two different setups in mind:
Setup 1) One theme and a set of different plugins. All subsites will look exactly the same, and use the same theme and plugins - every site is simply a copy of a main site.
Setup 2) Different themes and plugins will be used for each subsite.
Same structure will be used in both setups (subdirectory):
domain : example.com
subsite 1 : example.com/site1
subsite … : example.com/site…
In both cases the subsites will be offered and sold to customers and clients, they will however not manage and update them, this will be handled by me
Domain mapping will not be used.
My interpretation of your answers is that I am allowed to use WP themes and plugins from envato elements according to my above description, do you agree?