Reddit lost over 1 million weekly search referrals in October.

Chief executive Steve Huffman says daily users could fall by a low-double-digit percentage from 130 million in the fourth quarter.

Huffman says a logged-in-only site gives Reddit more ad-targeting signals and protects access to its data corpus.

Reddit’s third-quarter net income rose 74% to $283 million.

Reddit starts testing the login requirement in select non-US markets in the fourth quarter.

How each outlet framed it
Ars Technica
ties the logged-in-only shift to falling search referral traffic and to ad targeting and protecting Reddit's data corpus from regulators

Sources: Ars Technica