There was a very interesting comment at that Reddit link by user cjudge about the SEC loophole that would allow U.S. citizens full use of all ICONOMI services:
"I don't think this should apply to "accredited investors" per the SEC.
Under the Securities Act of 1933, a company that offers or sells its securities must register the securities with the SEC or find an exemption from the registration requirements. The Act provides companies with a number of exemptions. For some of the exemptions, such as rules 505 and 506 of Regulation D, a company may sell its securities to what are known as "accredited investors." The term accredited investor is defined in Rule 501 of Regulation D.
For more information about the SECs registration requirements and common exemptions, read our brochure, Small Business & the SEC. For more information about how individuals can be accredited investors, see our Investor Bulletin on accredited investors
https://www.sec.gov/answers/accred.htmAnd here's Rule 501's definition.
http://www.ecfr.gov/cgi-bin/retrieveECFR?gp=&SID=8edfd12967d69c024485029d968ee737&r=SECTION&n=17y3.0.1.1.12.0.46.176Places like BnktotheFuture accept US investors based on this rule...