Can someone explain how Zapsurveys and inbrain.ai connect?

Every time I tap the survey button on the Zap site a new tab opens up that says inbrain.ai on the bottom with plenty of surveys which I have completed, but the money it shows I have earned on that tab is not back on the Zap page, and there is no way to cash out from that tab? So confused. The Zap balance sits at 2 dollars for joining, but the money from surveys is nowhere to be found :(