Set a dynamic `activateAccountSuccessPath` How to set a dynamic path for activateAccountSuccessPath that contains the username (or any other field from the user profile)?
Completely untested, but something like this should do it.  Create a simple plugin and add this to the main plugin class:

public function init()
{
    craft()-&gt;on('users.onBeforeActivateUser', function(Event $event)
    {
        $user = $event-&gt;params['user'];

        craft()-&gt;config-&gt;set('activateAccountSuccessPath', 'members/'.$user-&gt;username);
    });
}