Facebook Ads Newbie Question

I've been browsing around for a while now, and this is my first official post.

I've been gathering information on how I should approach my first cpa campaign, and it's been quite a headache sorting through all this information.

What I have decided I would focus on is Facebook ads and sending traffic to my email opt-in. I have yet to actually run this campaign as I'm trying to clarify this tidbit in Facebook's ad guideline:

Ads cannot require viewers to click on the ad to submit Personally Identifiable Information (such as name, date of birth, phone numbers, social security number, physical addresses, or email addresses) on the landing page or in the ad, except to enable an ecommerce transaction and where the ad and landing page clearly indicate that a product is being sold.

What I take from this is I can't collect any user information which includes email address unless I'm making some sort of ecommerce transaction.

I've noticed plenty of threads regarding using Facebook ads to build a list, I was wondering if there was a certain way to go about it.

I apologize if this has been answered somewhere, I just couldn't find it through search.

Thanks.