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Yes. See the Reg A token sale filing docs on the SEC Edgar system for the STX token [1].

Disclaimer: I work on STX and its blockchain

Very interesting! What's the conclusion? The last document appears to be dated 2019: https://www.sec.gov/Archives/edgar/data/1693656/000110465919...

So they did make token sales, and complied with the "accredited investor" rule.