I kinda doubt it. TRU has a reputation of selling some stuff at above what the market maybe should be. But when it came to fidget spinners and fidget cubes, they went with a company and sold their stuff for a really fair price. I bought a bunch from there.
Prices between online and in-store were consistent in my experience, so no issues there. I think companies like Amazon and other online retailers(or who function mainly online) really ate into their marketshare. Me personally, I like to LOOK at stuff up close and in person before buying, which the online stores simply can't do. I do know that I would buy things where cheapest, so I might have to exploit TRU to examine a product, only to buy somewhere else to save money. I also know I made a LOT of decisions to not buy certain things at all after a closer examination. Stuff like Nerf blasters, video games, Hot Wheels and most action figures are commodity type items but you still want to see what exactly you're getting before plonking down the cash. I also know stores like Target and Walmart were getting some of that marketshare too, but TRU always had the largest selection. I think the exclusive brand stuff might have been putting money and efforts into products that didn't pay off so well, but I also don't feel it was enough to take down such a large company. My thoughts are that they are so big that they may have lacked proper top tier guidance and the ability to adapt quick enough to move to an evolving business model that better matches the current trend that smaller retails can utilize.
I always saw the fidget spinners as a short trend so it's no surprise it's already "spinning down". I don't see these spinners having the same sort of long appeal that has allowed things like yoyos and spintops to stay around so long.
