There’s something suspect/weird that needs unpicking on why such a flow of cash has gone into Uber. Emperor’s New Clothes? Some elaborate financial engineering? But not sure this is it. For a start, IPO proceeds went to the company, not SoftBank, et al. https://www.sec.gov/Archives/edgar/data/1543151/000119312519103850/d647752ds1.htm#toc647752_5
I’m not sure what the thread’s author means by “laundering”, but usually it would imply taking dirty money, you know - cleaning it, and getting it back. Not sure anyone investing has made money unless they have an expense account (anyone getting fees has made $$, for sure).