I myself as a video maker personally know that 3 accounts do not benefit you that much unless you are just after a character standing still or using a dance move.
As when it goes for capturing you cannot really control more than two characters in a good way at the same time. The third account becomes very low on usage area for moving shots. But indeed, if you need a still character for lets say certain shots in a movie or maybe even comic I understand.
But it still doesn't benefit you as a player to have more accounts, 1 account is all that you need to be able to connect to the game and play, and that was what I was after. Not to mention the pointing towards account hoarders. Having 3 accounts is more of the "meh" do as you please situation more than account hoarding, there's no fine line where it starts to become hoarding, that's why in general users shouldn't go around creating lots of accounts unless they have a good reason, making videos is an understandable one, but there's those out there who doesn't even do that and still stack up on accounts, and if everyone would go around with lots of accounts for pretty much no good reason at all, all of the things mentioned above will happen. If someone takes good care of their few accounts and actually use them I couldn't care less xD
But having lots of accounts, keeping changing them because of bad behavior, troubles settling with names, wanting to sneak up on friends, I just see as a selfish and a pointless cause, and no matter how many accounts you have, or what you use them for. You will only be able to truly focus on one instance of the game at the time, maybe people want to boast about multitasking and having several windows for different roleplays going at once and that's cool I guess, but you still aren't paying full attention on either of them.
Maybe there's tiny benefits, but not big enough to change that anyone should stack up on accounts, it's wrong. Kinda just wish people were a bit more considerate when it came to the accounts and as long as someone take good use of the ones they have, they shouldn't feel like I'm out to get them since no one can really stop anyone from registering more than one.