This may not be a bold prediction, but I imagine that more and more fake users will continue to exist on reddit. No action will be taken to remove bots that are used by governments, marketers, researchers, and soon script kiddies. Reddit employees will know that this is a massive problem, but the business will not want to do anything to stop user growth and jeopardize the value of their platform and its size. Most real people won't know how frequently they are talking to bots, and conversations will be drawn down into the gutter. Within 5 years, 50% of all posts and users will be bots.
Bitchute looks like it has fallen prey to the Voat problem. This is an issue with decentralised/anonymous things - they tend to attract people with extreme opinions who aren't really received well elsewhere. It's not really a problem by itself, but it is when everyone fits that mold because it tends to stifle discussion/content. I do like the look of DTube, although they could have made the layout a bit less YouTubeish. I'm assuming it was created by the Steemit devs?
I would like to know how Lino attempts to solve the "proof of human engagement" issue. It's something I thought about the other day when suggesting a similar platform. It seems like the solution would have to be intrusive or annoying, and would probably be a deterrent for new users. I did check out notabug and it kind of highlights the main issue. It is slow as fuck. Sites like these often require a bunch of page loads to look around and do stuff, and I can see that getting incredibly irritating.
The logic behind doge would be the transactions fees. I'm not suggesting we would use doge, or even that it would ever happen, it's just one of many ideas that has been discussed before. I'd be very wary of running an ICO because that means we could end up in a situation where we are focusing elswhere instead of just on the site. I imagine we could end up potentially running into legislative/regulation issues at some point too, and at the moment it's not really a necessity since the site is very cheap to run.