such things are not about "i did that and i was not geting banned".
its about "is it not aloud because its against some rules".
please dont speculate, just read the rules.
Game Rules (http://www.elementsthegame.com/rules.html)the only reason you can get banned is:
"Using any third party program to play elements might result in a temporary or permanent ban of your account. "
"5- Exploiting a bug that gives infinite money/cards/wins may result in your account being deleted. Nothing against you, you found a bug and you are having fun with it, but it is just not fair for other players."
in fact, if you find/using a method to obtain "infinite money/cards/wins" with more then one account, zanz might delete/ban your account.
otherwise its completly no problem to play with more then 1 account.