Confusion is created only in the mind. It's really not a big deal. The more you know about it the less you'll be concerned.
If nothing else, what BRP has done makes my point exactly. They don't even sell the the recommended full synthetic oil anymore.
First, BRP does not make any oil products. They buy from an oil producer and slap their label on the can/bottle. It amazes me how some people struggle to conceptualize this. Your Spyder cannot read the label on the can. All it cares about is getting a good quality oil to lubricate the parts.
The recommended weight of 5w-40 is just a starting point, not an end all. A quality, full synthetic oil like AmsOil, Mobil 1 and others is the most critical factor. As long as you get in the ballpark of the recommended weight you’re Spyder (and you) will never know the difference. Though I would not recommend going lighter than the recommendation, going a bit heavier, especially on the low end, isn’t going to make any difference. The difference between 5w and 10w isn’t enough to worry about unless you’re starting the Spyder in VERY COLD weather. Once at operating temp it isn’t going to matter at all.
10-40 weight will work just fine in the Spyder. Why someone would use a blended oil is beyond me. “Blended” is just a marketing term to make cheap, diluted Synthetic oil sound better than it is.
Get a good, fully Synthetic oil in a 5-40 or a 10-40 and live a long and happy life. You can probably get a great, full Synthetic oil for about what you'd spend on a BRP quart of "Blended" oil. You'll ger more protection and extended engine life. This will free you up to expend your energies on more worthy issues.... Like which tire to put on the back when this one wears out!