The "Join as Member" button appears only when both conditions are met: 1. The seller has enabled "Allow Buyers to Apply Online" (Organization & Settings → Company Profile Settings → Brand Assets → Login Page Subdomain Settings). 2. The public page link is opened using the seller's own subdomain (for example, xxx.patisco.com). Links opened from v5.patisco.com don't carry company information, so the button won't appear. Clicking "Join as Member" takes you to the "Apply to Become a Buyer" page. After filling out the application form and agreeing to the Terms of Service, you submit your application. This is only an application—you won't immediately become a buyer or create an account. After the seller reviews your application, they will send you an invitation. You can log in to view this seller's catalog and quotations only after accepting the invitation. If you already have a Patisco account, please apply using your own login email. When you accept the invitation later, log in with the same account to avoid creating a duplicate account.