How are themes bought

Are all the themes included in a purchase? Or how would we acquire the following…

I product per purchase and this can be used on one site/project.

You buy it by clicking the button to the right on the item page.

The only exception is which is a subscription with unlimited items BUT bear in mind that:

  1. it’s for items on and NOT the entire envato marketplaces

  2. accessing some items eg WP themes may require annual subscription