>>631146183D studios are really expensive and there's a lot of setup work involved with the equipment, recording and so on. Cover has its own inhouse studio so that they can avoid paying a rental fee every time they need to record something, but obviously a single small studio can only handle one project at a time, so they end up with a long backlogged cue.
Going outside of the inhouse studio would mean renting studiospace and equipment from a 3rd party mocap studio. These exist, but they're very expensive and charge by the hour. Those sorts of studios typically exist for CGI movie production and to a lesser extent game development, things where the budget can stretch into the millions and a significant amount of that budget can be allocated to recording motion capture and audio.
Plus it's still relatively niche (and rare) for live broadcasts to be done in a motion capture studio and that requires its own set of equipment and production expertise that a 3rd party may not be suited for. So it just makes sense to produce things inhouse.
