Yeah that was my source as well. But there's some CCTV footage that appears to show the plane moving upside down much faster than taxiing speed, so seems like it was just a rumour.
Those were individual public opinion polls. Basically the raw data of a questionnaire which may have been targeting specific areas or demographics.
The 338 data is the best guess at who would win if the election were held today. It takes aggregated polls, ridings, demographics and historical data into account. So it is a much more sophisticated prediction.
However, it notably doesn't project into the future. That means the odds are not taking into account current trends, so Poilievre's drop from 100 to 75 is extremely significant. His odds will likely continue declining for some time. The question is where will it taper off and will there be a rebound before the actual election.
What effort and spending did we do? My understanding that it was just a bunch of platitudes or things that were already in the works.