Very little. This is a static site with no accounts, no logins and no comments. Privacy-respecting analytics record aggregate figures — page views, approximate region, referring source — so I can tell which pages get read. No advertising profile is built and nothing is sold to anyone.
If you email me, that thread exists until the conversation is finished. It is the only personal information held anywhere.
Links to casinos on this site are affiliate links. Following one may set a cookie placed by the operator or its affiliate network rather than by this site, so the operator can attribute the referral. That cookie is governed by their privacy policy, which is worth reading before you register, because from the click onward you are on their property.
No personal information about what you do there ever reaches me. I am told that a registration happened, not who made it. Blocking or clearing cookies stops the mechanism entirely, with no consequence beyond this site not being credited.
Canadian privacy law, principally PIPEDA, gives you the right to ask what personal data is held about you, to have it corrected, and to have it deleted. In practice the answer here is almost always an email thread and nothing more. Ask, and I will confirm and act promptly.
Nobody below the age of majority in their province should be using this site, and information is not knowingly collected from minors. If you believe a minor has been in touch, tell me and the record is deleted.