Vote cost is not a crazy hyperparameter: it's only an arbitrary unit of measure. If votes "cost twice as much" everyone buys sqrt(Xi/2) votes rather than sqrt(

Vote cost is not a crazy hyperparameter: it's only an arbitrary unit of measure. If votes "cost twice as much" everyone buys sqrt(Xi/2) votes rather than sqrt(Xi), by spending a fixed sum Xi that depends on the utility of winning the vote. Results are unchanged.