First of all, if you have two accounts but only play on one account, it's very unlikely we will do anything. We've no intention to punish anyone further if they've lost their account one way or another.
Now, as for multiple accounts in Super Mechs... It indeed breaks our terms of service and we may choose to crack down on it more in the future. Besides using SM systems in a way they are not meant to be used, using multiple accounts causes tons of technical issues ranging from simple logoffs to inventories going weird and who even knows what else.
My recommendation is to play it safe - play on one account and nothing will happen to you. We usually don't mind if you have a girlfriend who also plays Super Mechs from the PC - we tolerate this (with significant evidence) in Battle Dawn and it's very unlikely we'll choose not to tolerate this in Super Mechs. (though there's obvious limitations: We don't believe you if you claim you've 6 girlfriends and all of them decided to play!

)
Long story short: Play from one account. It'll save you a huge headache.