Yeah it seems every social media platform wrestles with this. Instagram every now and again will do something that stops the like, follow, comment bots for a week or two and then a new site or service pops up or the existing ones figure out a workaround.
I think Youtube has been the most effective of platforms on stopping this and I think it's partly because they are a video platform. They use watch time along with a host of other things like comments, thumbs up and down, engagement, etc.
Buying views on Youtube is really ineffective and honestly it many cases it can actually do more harm than good in that your watch time or retention suffers because these bots visit your video for a few seconds and leave.
It seems the only way to really trick or hack youtube is more through social engineering for lack of a better word ie giving away prizes and money. Most giveaways on youtube are fake, people never actually give away anything but it allows creators to get people to jump through all types of hoops like watch this til the end of the video, hit the thumbs up, say something in the comments.
RE: Why Bid Bots are Bad for Steemit | Imagine if the NBA Allowed People to Pay to Play in the League?