WordPress technology lookup

I was wondering if someone could suggest a similar to thetab.com setup.
This website seems to be running on WP multinetwork, with Jetpack, fillet and Yoast SEO plugins.

Any ideas on implementation’s details?
Is this really a multi wp installation that can be achieved with every theme?
Is it using a commercial theme or a custom one (seems like a custom).
Any clones publically available?

Thanks in advance :slight_smile: