How could I add recently viewed products grid to customer account page?

Is there a way to add an email marketing permission checkbox to customer account so that it would add customer's email to newsletter list if selected?

I have this Online Store 2.0 supporting theme and I have added a text block to product page that should only be visible to logged out (guest) customers.  I found this code:{% if shop.customer_accounts_enabled %} {% if customer %} {% else %} ...