Specific numbers aside, one possible reason is they want to increase adoption to gain user volume, in order to have an effect on the larger ecosystem.
Once you have non-trivial network effects, you could continue to influence the ecosystem (see: MSIE, Firefox in its early days, and Google Chrome). There are probably multiple paths to this. This is one.
Once you have non-trivial network effects, you could continue to influence the ecosystem (see: MSIE, Firefox in its early days, and Google Chrome). There are probably multiple paths to this. This is one.