There is no affiliate link in ManyChat Agency Program.
To register a page for commissions, go to the Billing section of the Free bot you are referring and you will see an APPLY button:
Click on that and it will connect the page to your agency account:
Once you upgrade the page to Pro you will get commissions for this page. There is no affiliate link required; this process is automatic.
For each page you connect to your Agency account you need to apply for Revenue Sharing individually.
Note: you MUST do it before you upgrade the page to Pro.
You can check out our Agency Program Guidelines for more information.
If you're not building bots on behalf of clients and just want to share a link, check out our Affiliate Program.