The Globe and Mail reports in its Monday edition that Twitter owner Elon Musk has limited the number of tweets that users can view each day -- restrictions he described as an attempt to prevent scraping of potentially valuable data from the social-media platform. An Associated Press dispatch to The Globe says that the site is now requiring people to log on to view tweets and profiles, a change in its long-time practice. The restrictions could result in users being locked out of Twitter for the day after scrolling through several hundred tweets. Thousands of users complained Saturday of not being able to access the site. Mr. Musk has pushed back on what he calls misuse of Twitter data to train artificial-intelligence systems like ChatGPT. They scour reams of information on-line to generate human-like text, photos, video and other content. Mr. Musk then said Saturday that unverified accounts will temporarily be restricted to reading 600 posts a day, while verified accounts will be able to scroll through up to 6,000. After facing backlash, he tweeted that the thresholds would be raised to 800 posts for unverified accounts and 8,000 for verified accounts before later settling on 1,000 and 10,000 tweets, respectively.