To become a Porter partner, follow these steps:
First:
Go to Porter's referral program webpage.
Second:
Click the "Become a partner now" button:

Third:
Fill in all the required information and check the captcha verification:

Fourth:
Fill in your profile information:

Scroll down and click the save button:

Fifth:
Insert your Paypal address and click the Add button or click skip to insert your Paypal address later.

That's it! You have successfully created your partner account:

Now you can share your partner link and earn a 20% lifetime commission for every referral you make.