Hi There,
Thanks for reaching out to Adobe Community.
Apologies for the confusion. AEM 6.1 (and all AEM versions – but we only really recommend integrating with 6.1) integrate in to the “platform” – which is Classic. You need to have a Target Classic user/pass on an account for it to work with AEM. Since behind every Target Standard instance there seems to be a Classic instance, that in itself should not be an issue. From my experience, every Standard customer still has a client ID and you can use the integration, whether they use the Classic Workflow or not.
Thanks!