Mark Zuckerberg didn't see this coming.

When Facebook Inc.'s co-founder proposed bringing free Web services to India, his stated aim was to help connect millions of impoverished people to unlimited opportunity. Instead, critics have accused him of making a poorly disguised land grab in India's burgeoning Internet sector. The growing backlash could threaten the very premise of Internet.org, his ambitious, two-year-old effort to connect the planet.

Indian authorities are circumspect because the Facebook initiative provides access to only a limited set of websites -- undermining the equal-access precepts of net neutrality. The telecommunications regulator is calling for initial comments by Jan 7, extending the deadline from today, on whether wireless carriers can charge differently for data usage across websites, applications and platforms. Losing this fight could imperil Facebook's Free Basics, which allows customers to access the social network and select services such as Messenger and Microsoft's Bing without a data plan.

"The India fight is helping shape debates elsewhere," said Pranesh Prakash, policy director at the Centre for Internet and Society, a Bangalore-based non-profit advocacy group. "Activists in other countries such as Brazil, Venezuela and Colombia are watching this debate and will seize the momentum created in India."