Not necessarily. Some tanks are mouth-to-lung even with their airflow wide open (i.e. nautilus Mini). Those that prefer direct lung inhaling would not purchase a tank like the Nautilus Mini.
Yes, you have to have 20 posts before you can apply to get verified. If you would like to speed up the process just go over to the New Member Forum and welcome some other new members.
Noted and thank you regarding the 20posts.