I collect the same data as any normal website: how people browse the site, and whatever they tell me via the contact form. I use it to improve the website and to sell products. I don’t handle payment data: that’s done by third parties. I don’t do anything unexpected or invasive and I don’t sell data.
Honestly, you’re leaking more information being logged into YouTube than you are by being here. Anyone who really cares about privacy can start here: https://www.eff.org/