I think there's nothing wrong with liking your own content, especially if you don't have a lot of followers. It allows you to gain a better position in the lists. It won't do much, but if you have very little followers or they are for some reasons inactive, it can make a difference. For example, I have like about 20 followers on FB, some of them have "popular first" option on, if I post a drawing or a link, they don't even see it! If I like my own post, at least I get a chance to be seen. I'm not a bad artist. I just don't have followers on FB. It's not that I manipulate stats, it's the stats that manipulates people's ability to reach a certain content. Also I think my posts feel lonely if noone likes them, I know it's weird, but I actually think it's something like this! )))