Like Instagram and others they have gotten quite hostile to visitors without an account. I guess tracking and monetizing your users earns a lot more than displaying ads for everyone.
While we're here, take another pro-tip: Set yourself up with an RSS/Atom reader and "Follow" accounts you are interested in through Nitter. No account, no random "We thought you might like", and no ads, just posts and retweets from the accounts you're interested in.
Unfortunately I'm not going to read another country's laws to see if this is actually the case.
During a gold rush, sell shovels.