Online groups of India-based atheists have seen a rise in number in the past decade. In the last five years, the number of online communities made up of ex-Muslims from almost zero to a handful. These groups boast memberships of over 100 people, with one group's membership reaching 300 individuals.
100 members in an online community is a pretty low figure. That is, if you approach the figure from a perspective that does not include the possibility of life-threatening violence and social stigmatization. Being an ex-Muslim has its inherent problems.