Twitter restricts viewing tweets without signing up, which receives massive criticism from around the globe. But after some days Twitter quietly removed these restrictions. Now it is not troublesome to view tweets. You can just open your browser and open the tweet link to view it.
In justification for these types of measures, Elon said in a tweet that Twitter is facing the utmost level of data scraping issues. And in addition, he said that these all temporary measures have to been taken to encounter this, and for not to humiliate the regular user.
Twitter has not announced or discussed this officially at any forum about putting this restriction or then removing it.