There's so much wrong with your facts I'm not sure where to start.
- The ethanol is not added at the station. Ethanol is not separate in any fashion in the tankers, it is mixed at the racks where the tankers load.
- You know that any fuel advertised as having ethanol is going to have
at least 5%, with most being in the 7% to 8% range. Zero question.
- Ontario mandates
by law an overall average of 5% ethanol per litre on an overall yearly average. This is the reason non-ethanol is getting harder to find, because every litre sold without that 5% means that percentage needs to be made up on another litre sold somewhere else..and since the percentage isn't allowed to exceed 10% (hence the decals on the pumps we all see), there's only so much non-ethanol they can legally actually sell in a year without potentially leaving themselves up the creek realizing they can't actually legally produce any more fuel for the remainder of the year. Needless to say no refiner in the province is going to make that mistake.
The economic advantage argument has little to nothing to do with anything at all. Refiners don't particularly like ethanol either, it's a PITA to run the supply chain to obtain it (more $$), a PITA to store it (more $$), it adds extra steps to the mixing and loading processes (more $$) and they are not magically immune to all the scourges that WE all deal with when it comes to ethanol either such as it's hydroscopic nature.
The only people that benefit from the whole ethanol thing is farmers and small engine repair shops.