I don't fully buy that $2 and $4 fees are the core reason for fewer rideshare users. Sure cost is a component, but the responses ignore increasing Uber and Lyft rates, as well as less happening in portland

Far fewer Portlanders are riding Uber and Lyft, or calling taxis
Ridesharing trips are down even more than public transit. Uber says Portland is among the slowest markets to rebound from the pandemic.
oregonlive.com