This is quite strange, he isnt posting to get activity because hi activity is currently maxed out for this activity period. It seems as if the rewason he is making all these pointless posts in the alt section is to advertise his signature which is a site that offers to mine alts for a very low fee, this seems to be the only incentive for him making all these posts.
Hey! I thought you'd left the forum.
These "reserved" posts drive me nuts, because I've seen them months-old, and the person never ended up applying for the campaign that the post was in. Those posts should be deleted by mods if that happens, but I don't think it's a huge deal now that we have the merit system. It might increase their activity, but it's not going to be by much just from these types of posts and certainly not enough to rank up with.
Having said that, this guy looks like he's basically spamming with "reserved" posts, and at the very least these ought to be looked at by mods. Usually people get in line with "res" and then fill in the details not long afterward. If he's not doing that, those posts are garbage.