Lego-owned marketplace BrickLink has been offline for almost a week after identifying "unusual activity on the platform," leaving fans unable to buy and sell spare bricks and minifigures. The company initially described the outage as "necessary work" and said the site would return on November 9. That deadline has come and gone. Visiting BrickLink’s domain automatically serves the platform’s maintenance page, which was last updated on November 11. "We took BrickLink offline after identifying unusual activity on the platform," the website states. "Our immediate priority was to secure the site, protect our members and ensure the integrity of BrickLink. "Before bringing the site back online, we need to fully understand what has happened. That means containing the issue, investigating how it happened and checking for related issues. "This work is still ongoing and we appreciate your patience while we work to get things back online as soon as possible." The references to security, containment, and investigation suggest something beyond routine maintenance, although BrickLink has not confirmed whether it suffered a cyberattack. The Register asked Lego for more information, but it did not immediately respond. Some adult fans of Lego (AFOL) have criticized the lack of information since the outage began on Friday, November 6…