Think about that for a moment. Imagine a world where Bitcoin is the standard, basically a couple of years ahead hehe. You are on your PC commenting on someone else thread, helping him/her about something. In the old web your time and effort was worth a "thank you" or a virtual up vote but here your contribution is actually worth real money, it has real value. People will flock here to share their knowledge to the world in exchange for a real monetary value, it's far easier to comment a single specific post or create a thread rather than:
- Run an entire podcast
- Open a YouTube channel
- Write blog posts
- Be socially present, and tracked
Of course you can still do the things above but the difference between the work you have to do to obtain the same amount of value in return will stop people to open yet another podcast or yet another blog.
This alone will incentivize people to contribute in a meaningful way because otherwise the time you spend spamming and trolling would be worth 0 in monetary value and you just wasted energy for that, like mining bitcoin basically.
Maybe it's just wishful thinking but I'm super bullish on Stacker News