[thentic]

Good point. Spypig likely has the problem of skewed open rates due to image blocking and we chose not to use due to that issue.

Tracking opens for 'cold emails' or even referral-based emails is important but can be replaced with persistence. As long as persistence is constrained with a measure of decency.

I get referrals from the businesses who join our site and use email to initiate outreach to them. I just want to know who's opening versus who's not as it affects what script we use for a follow up phone call.