DIY Tel Aviv collects your name and email address if you buy a guide through the site or sign up to the mailing list. Financial details are dealt with only by Stripe / Paypal.
When you comment on a post on this website, the name you give, as well as your email address are also recorded.
DIY Tel Aviv does not share or sell email addresses. The mailing list is run by a site called Mailchimp, so email addresses given for the purpose of joining the mailing list are shared with Mailchimp and Mailchip only.