Montreal tries Formula E in 2017, the 60000 expected sear sales only was 45000 seats filled, the major portion of those seats were giveaway and promotion seats. Most people who attended are in no rush to see it any time soon.
I dont think the crowd who wants to see combustion engines battle for supremacy on a track are the same folks who want to bare witness to the same performance from electrics whizzing around the same circuit. Does not seem to translate well.