https://www.jamsadr.com/arbitration-fees >> https://www.jamsadr.com/employment-minimum-standards/

Standard No. 6: Costs and Location Must Not Preclude Access to Arbitration
An employee's access to arbitration must not be precluded by the employee's inability to pay any costs or by the location of the arbitration.
The only fee that an employee may be required to pay is JAMS' initial Case Management Fee.
All other costs must be borne by the company, including any additional JAMS Case Management Fee and all professional fees for the arbitrator’s services. In California, the arbitration provision may not require an employee who does not prevail to pay the fees and costs incurred by the opposing party.

Normal 2 party fee is 2K +13% That could add up quickly. 1.8 million in startup costs for the employer, and then the employees have not gotten anything yet. But then what is a few measly millions if you are intent on making 44 billion go up in smoke.