Privacy
Short version: I only collect what I need to send you the Sunday email and to see which links bring people in. I don't sell your data.
What I collect
- Your email address, and the answers to the optional questions if you fill them in.
- Which link brought you here (for example an Instagram post or ad), stored in your browser and sent along when you sign up.
- Whether you open or click the emails, as measured by my email provider.
Where it's stored
Emails are sent with Kit (kit.com). Signups and the link that brought you are also stored in a private database (Supabase). Only I can read them.
What I use it for
Sending the Sunday email, choosing which ideas to test, and knowing which posts and ads work, so I don't waste money on the ones that don't.
Your choices
Every email has an unsubscribe link. To see or delete what I have about you, email erwin@sundaylab.co.
Who runs this
Sunday Lab is run by Erwin Cuijpers, EAC Business Development, Venlo, the Netherlands.
Last updated: 1 November 2026