I think the content at HN is pretty good. Some other novel approaches I have seen includes upquest.com which has voting based on where you think the score is headed. I think (as others have mentioned) downvoting introduces issues like for example downvoting articles around the one article you want upvoted.
You seem to be making a lot of flawed assumptions here.
Even IF you are to assume this is a simply speculative "greater fool" scenario Robinhood just ensured through their interference that the last buyers are less likely to profit.
Robinhood's job is not to police transactions it is to process them. That they would do this for a few million $ in potential customer support time is so naïve.
Letting them off the hook for illegal manipulation because "it is a headache" is one of the stupidest arguments I have heard.
And even that is tenuous. In cases where you run afoul of AML regulations, cryptocurrency will not save you.
In cases such as this where you break no laws, but your payment processor refuses to process payments ... well, at some point you'll have to convert your crypto cash into real cash - so all you did was kick the ball downstream and fixed nothing. If MasterCard refuses to process your payments, they can also refuse to process payments for the crypto exchange if they do business with you.
Crowdfunding should be loosened. Sure some people will get scammed but it is the same people who the government allows to sink their weekly paycheck into scratchers. These regulations are only in place to give PE a monopoly on certain investments.
The critical difference being that government makes a lot of money off gambling taxes; it may be a negative-sum game, but it's their negative-sum game.
I came to that conclusion. I'm trying different searches that might be more unique to covid-19, like labored breathing. I'm trying to think of other proxies, maybe things like "coronavirus home remedy", etc.
Yeah, it is strongly associated with the flu seasonality. It makes sense considering what sick often people do, their first reaction is to type their symptoms into Google.