Under one Leadfeeder website account you can add 10 Google Analytics views. When a new view is added, the leads will be seen on the same lead feed.
If you do not want to add a new billed subscription you will want to add a view, not a website.
If you aren't sure if you should add a view or a website please check here.
You can add a new website account if you want completely separate accounts and subscriptions.
STEP 1: Click on your name in the top right corner and choose Your settings from the menu.
STEP 2: Click on the tab Company and Websites at the left side menu.
STEP 3: Click Add a new website and follow the instructions.
This will begin an entirely new billed website account with its own Lead quota.