I hear what you're saying, but as a guy who knows this much |-----| about crypto, I would be worried about the same thing using anybody else's coin. Sci-net having full control over the value of the coin means they don't have to worry as much about uncontrollable fluctuations in coin price going with an established coin, especially now that governments are getting in on the action.[1]
The whole basis of this scheme comes down to trust on so many levels. Like:
> When creating a request, you can specify the amount of tokens uploader will receive for sharing the paper. However, the tokens will not be transferred after uploading the PDF right away, but only after you check the solution and click the 'Accept' button. The tokens subtracted from your account will be added to the uploader.
So a jerk can request a paper, receive the paper, then never pay for the paper if they feel like it.
I think this is just how the community is run.
[1] I guess people could still make a run on sci-hub coins outside of this market, but I bet the scale of the coin will never reach a level that makes that tempting.