I was going to mock you, until I remembered the reason I have 11 characters in World of Warcraft is mutual support in gathering, crafting, and World of Pokemon. Not because all 11 characters are equally fun, interesting, or enjoyable to play in the main content of the game. "Trade alts", they're called in the parlance. (The presence of a standard name for the phenomenon says everything that needs to be said about its prevalence.)
So, yeah. It's a pretty common effect. OTOH, I only pay the basic subscription for the account, and WoW doesn't have any Pay-to-win type of purchases, so it's a bit different than the subject of TFA. (Paradoxically, I'd probably quit if WoW became free-to-play, but limited until you paid. Don't know why, since objectively it probably wouldn't be much different that straight-up pay-to-play.)