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they kinda look like a scam. team is like nonexistant. you can't find any information about them.

untrue lots of info on Nuls what are you talking about?

NULS just signed a partnership with BTS

I could find it.
https://www.stox.com/team/

You tried looking up anyone to see if you find any info about those ppl, where they worked before ? For every "real" company, ppl are posting their Linkedin. Not even 1 person can be found on linkedin. And neither the company (nuls) as employer.

NULS is real and the team too, they are chinese so their profiles are on chinese websites.