This looks innocuous. It lets them consolidate cases of “substantially similar nature brought against either party by or with the assistance of the same law firm, group of law firms, or organizations.”
Each side picks eight cases while the others are held. Once those sixteen are decided the rest are resolved, collectively, taking those sixteen cases’ resolutions into account. At each step, you can dispute the characterisation, and Zoom pays the arbitration fees.
I misremembered; it’s 16, not 15