SAN FRANCISCO (AP) — Elon Musk has limited the number of tweets that most Twitter users can view each day. He described the restrictions as an attempt to prevent unauthorized scraping of potentially valuable data from the social media platform. The site is now requiring people to log on to view tweets and profiles. That’s a change in its longtime practice to allow everyone to peruse the chatter. 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. Musk said after facing backlash that he would raise the thresholds on how many tweets accounts can read per day.