To add, discourse is pretty big among techy communities, including, ironically, the fediverse forum. It also has a pretty terrible user experience, but also a ton of tools for corporates, which lemmy will probably need if they want to market to those types (lot of potential money there).
And the thing is, even if those don't add to the regular fedi/threadi verse, they still get people familiar with the platform and UI.
I don't see why they need a front. They could just say they tracked him down from regular evidence