I'm John Allsopp, I'm a freelance digital marketer, a sole trader here in the UK and Surge Marketing is my thing.
Behind this particular website is a database, so if you do provide your details they will go there. That's held underneath Canary Wharf in London by a chap I studied with at Uni. That's a good thing.
I also use a service called AutoPilot to send out emails to people who request it. Every email provides a link to leave the list. I believe that company is Australian so I guess your data goes there.
It is possible, without me knowing who you are, to use various platforms (I'm thinking of Facebook) to re-target you with ads. You know, you look at a product and suddenly there are ads for the product all over your Internet. I've never done that, but it's possible I might try it. People keep telling me it works well, but I don't want to irritate anyone.
Other than trying to provide you with useful information I don't think I do anything else you might find problematic.
I've always used good passwords and taken decent backups and so on.