  Individuals recovering from substance use often seek social support
(emotional and informational) on online recovery forums, where they can both
write and comment on posts, expressing their struggles and successes. A common
challenge in these forums is that certain posts (some of which may be support
seeking) receive no comments. In this work, we use data from two Reddit
substance recovery forums:/r/Leaves and/r/OpiatesRecovery, to determine the
relationship between the social supports expressed in the titles of posts and
the number of comments they receive. We show that the types of social support
expressed in post titles that elicit comments vary from one substance use
recovery forum to the other.
