This is because IQ Meta is currently running in a "bootstrap mode".
"Bootstrap mode" relaxes the minimum required reputation to perform actions like voting and commenting. This is useful to help new communities get started.
Once enough members have built up enough Karma Points to enable IQ Meta to run under community control, I'll be switching off "bootstrap mode" to minimize the risk of the site being targeted by spammers, trolls etc.
I switched off "bootstrap mode" some weeks ago after spammers started taking an interest in IQ Meta.