You mean that I am allowed to use a second account to use as another official member, I can use two accounts to participate in different signature campaigns to earn decent money 
You wouldn't be the first, and you won't be the last. "Account farming" has been going on for as long as I can remember, and the driving force is earning money. Usually, it leads to spam, just like when YoBit opened their "free for all" campaign, and many accounts suddenly reactivated.So, if the above example is Ok for everyone here, then it's fine for others too as long as they don't scam/cheat anyone.
I've seen the suggestion before, but this forum isn't about restricting freedoms.