Maybe rather than doing the flat rate pass, a solution might be the implementation of peak, off-peak weekday, and weekend fares.The weekend day passes are great for enticing ridership back - but on weekends, the Lakeshore trains are packed, and they’re still running every half hour only. Given the reduced service, and the goodwill the passes provide (as long as you know about them) I think it’s worthwhile, at least until the fall. At that point, could hike it to $15 from $10.
Maybe there’s a case for a temporary weekday pass as well, where there’s likely more spare capacity than weekends these days.
Off-peak fares could be a slight discount, while weekend fares could be a heavier discount, but would still take into account distance travelled.