New users that have to come here for the Path of Exile horns exclusively seem to be quite confused about the ARP system. Some are trying to get ARP by flooding the forums with low effort posts because they believe they can get lvl 5 by trading votes. The reality is that your votes wont gain you many points if any at all.
The amount of ARP you are rewarded from a post is calculated from an invisible CG (Community Gain) scoring system in which you gain more points if a higher level user upvotes your post and low level users have little to no effect. Another thing to keep in mind is that most of these low effort threads get deleted and you lose 10 ARP and all points you got from that post. On top of that users who upvoted a post that was later deleted lose 1 ARP.
If you're here just to get the horns then try making a bigger effort when making a post. Try to make something that the higher level users would like to see. If you want you can read more on the FAQ or the sticky ARP guide.