Upvote bots are mostly used as an investment in promotion. As long as it's economical to promote a post they will be around and promotion can serve a valuable purpose.
There are going to be many uses for the blockchain many of which will be via posts. Just think zappl for tweets. We need more services that will filter the available content in a more targeted way.
@eroche that is exactly what I was just discussing with a fellow steemian, that if we implement more targeted content with the creation of apps that would basically be steem's response to tweets, or instagram it might solve much of the spamming post. At least in the sense that It would allow us to filter out content we might no be interested in.
I'm loving the fact that this post is becoming a pool for ideas, this was my intent by writing it.
Thank you for stopping by.