I don't believe they ever had any intention of getting the poor online. They have so far never released ANY data regarding how many of the users of Free Basics are first time Internet users despite it being one of the top demands of critics of the Free Basics program. Some independent third party analysis suggest that the overwhelming majority of users of Free Basics are existing Internet users, many of them who have no idea they are on Free Basics.
Reliance (the telco that Facebook has partnered with) doesn't advertise the Free Basics program as "access for the poor" but as "Free Facebook" and doesn't even mention the additional websites available for free on Free Basics.
My guess is that with Free Basics rolled out in 36 countries without any issues, Facebook never expected any opposition.