This same DMCA company (WorthIT Solutions) previously tried to DMCA the php docs range function page on behalf of HackerRank [0]. Pretty crazy. [0]: https://www.mail-archive.com/php-webmaster@lists.php.net/msg...
One way for HackerRank to do the right thing would be to sue WorthIT for breach of contract and loss of reputation. Their contract must have included some requirements for due diligence on filing those notices, and having these bogus DMCA notices does hurt HackerRank’s reputation, especially with its target audience. Only way to make this stop is make companies like WorthIT feel financial pain from their actions.
Which is exactly what it is.