Yes Swati, as of now the admin. has not informed about any restrictions on submitting comments to non-academic articles and these will be allotted points and cash credits, but only if worthy of it. However, I do personally think it would be sensible to put in comments only to academic articles. Since the focus now is on the new academic niche, at some later stage if the admin. shifts everything to the archives like what was recently done for the jobs' section, then the comments will not really be visible.
When you make a commitment, you create hope. When you keep a commitment you create trust! ~ John C. Maxwell