Does Daisycon have a privacy statement that sets out what data is stored?

Yes, a privacy statement is available, and can be accessed on the Daisycon website: https://www.daisycon.com/en/privacy/

Daisycon recommends advertisers using its services, to refer, in their own privacy statement to that of Daisycon. A standard text is available for this. It can be found here: 

https://www.daisycon.com/en/standard-text-privacy-statement-advertisers/