There is no need for any individual to have alt account instead to spam signature campaigns.
18. Having multiple accounts and account sales are allowed, but account sales are discouraged.
As you can see having multiple accounts are not prohibited. As long as you're not abusing it.
Even the the mod "hilarious" has his alt, even I do have an alt.
Alt accounts are not actually needed in this forum because one account is enough to get immense knowledge and to stay updated to the forum always.
You maybe right, but some people may need it anyways.