Alts cannot be used to benefit mains.
A well known rule. One that should be followed to allow for a fair and equal game(in the most general of senses).
But it has come to light that this rule is too vague and needs to be clarified.
Alts are any account that is not considered your main. Your main(correct me if I am wrong) is the account to which you favour, and play the most. It may not be the one with the most AD, or the strongest, but the one to which is most "popular".
Now, to use any other account, besides the "Main" is to be considered an alternate account, AKA an alt.
When you use these Alts, you gather information. It can't be helped. You see conversations, or learn new things about combat, or other players. It's inevitable.
How can the rule restrict someone from not using information they learn on one account, and applying it to their main? It's benefiting them, is it not? So it isn't allowed, right?