@amiramnoam - I have seen lending type crypto businesses pay out a very attractive payout in the beginning, to attract more deposits. Then when the deposits grow very large and payouts become very high, they just fold up and disappear. I am not saying Bitconnect may do that but from your analysis, it looks like a possibility. Will keep an eye out to check for signs.
Thanks for your involved analysis. Upvoted full.
Regards,
@vm2904