>>528419724
Kinda, there have been systems of progression and "ranking" that did a great job of encouraging players to stay on their mains and keep playing the game at their actual rank/MMR. While the balancing was genuinely terrible and completely ignored by the developers, Halo Reach's progression system generated a lot of individual pride for players. Both through the ranking system itself and the cosmetic rewards. Unfortunately, in today's industry a system like this would never exist. Even OW1's lootboxes did a to help dissuade smurfing. A well-timed skin release or event would get people back onto their main accounts for at least a short amount of time.
Blizzards full-focus on whaling and sales prevents them from utilizing a lot of tools available to encourage engagement naturally and honestly.