I have inserts on my products which ask customers to register at my website for deep discounts for other products. Is there a way I can customise a page in My Seller Pal's brand website to collect ...

Answer: Yes, you can by creating a landing page intended for those customers using "Unique Code per User - Email Opt-In promotion" and then link it to your brand website. It is important to note though that this will only work if there's an offer or promo code in exchange for the customer's email. If you're only after a sign-up or opt-in form, My Seller Pal doesn't support it.

Related help documentation:

https://mysellerpal.zendesk.com/hc/en-us/categories/360000618234-Website-and-Promotions