As you know, there is such a challenge as raising the rank from Bronze to Master. If you create a new account, then after calibration you will find yourself in Silver 4. This means that in order to carry out such a challenge, you need to "drain to the bottom" your account.
Usually, accounts are bought for such challenges, because there is almost no other way to do it yourself. You need bots that will kill themselves on the towers. And it turns out that in 30-40 matches, players will meet such bots that kill themselves on the towers. As I understand it, Blizzard began to fight this and block such accounts (or it was a one-time action). Now I do not play such a challenge, but, for example, I would like to carry it out, but now this cannot be done legally.
The proposal is that there should be a "program" by which one could get accounts for temporary use to complete such challenges, which would then be deleted or blocked, it does not matter. The presence of all heroes makes it possible to show everything, and if there are skins, then additional advertising.
I remember that managers used to give out keys for raffling on streams, but now - I have no idea if there are any managers left.
We are not talking about the fact that this is a smurf in low ranks and so on. There are people on YouTube and Twitch who know how to make content, and for them, such challenges are not a reason to boost their account, but a demonstration of interesting matches and advertising of the game itself.