My first thought was that this meant Lightning Loop was doing 75-99 BTC in weekly volume, assuming all funds were moving in one direction and all channels started empty and were closed once full.

However, this is probably an oversimplification, and doesn’t consider any Loop transactions in the opposite direction (they support Loop In & Loop Out), or the state of their channels when funded and closed. It also doesn’t consider any routing their node does while channels are open.