I’ve disabled woocommerce and it wasn’t woocommerce. It was the plugin GermanMarket only when I deactivated it, the column disappeared.
So I will open a request to the GermanMarket support.
I don’t know how to quit a topic here there is no button but hereby the topic is resolved.
that double opt in column is not part of buddypress.
I thought the activation is part of WooCommerce and BuddyPress gives me the oportunity to manually activate accounts even if I haven’t the activation link that is send with the registration email.
relating to newletters or similar
The column is definitely for user activation I’ve set the value via phpMyAdmin from waiting to activated and it activates the user.