This website is free only for people who do not block ads

For example, Firefox browser itself can cause ad blocking, too: Settings / Privacy / Tracking Protection: "enabled". Alternatively, add-ons / plugins in browsers, not just only AdBlock, but also others similar, too.

Have you disabled all add-ons and extensions that are blocking ads and still you can't access the site? Try a different web browser: Google Chrome, Microsoft Edge, Apple Safari

The site is free of charge only because its traffic is paid for by the appropriate display of ads. We understand that some sites are forcing people to use an ad blocker - sites that are overcrowded with ads, sites where pop-ups with a full-screen ad appear when a page is displayed, or a video ad runs itself. Our site displays absolute minimum of ads so it doesn't bother. Registered users see even less ads. VIP users does not see any ads at all.

VIP users have an exception - they don't even have to disable ad blockers.