I think the topic is on point but Dollarama seems to have monopoly and they often go direct to the manufactoruer to get a good deal for the end user. Make sure you do a cents per gram comparison to assure you're actually getting a deal and you're good to go.
Personally I can buy a $1.49 hose adapter that sells for $4.99 at crappy tire and they seem to last longer as well.
Yeah, the quality of everything now has just gone to shit. We really need to stop purchasing all of this crap from these companies because it just encourages them to put more slop onto the market.