From the history of the world cockroach: 64 clients.

One company in the 50s of the last century implemented an epochal breeding. She selected 64 leading brokers who were engaged in stock trading and had in the portfolio - a popular share of one of the leading American corporations and offered them to sign up for a "prognosis" of the exchange rate of the shares. Of course, nobody bought anything.

Then they split the base of potential customers into two parts in a random way. The 32nd sent a forecast that tomorrow the ACTION will grow, and the other 32nd - that it will fall.
The next day, the base of those for whom the correct forecast was made was again split into two parts. The first 16 sent a forecast that the ACTION would grow, and the second 16 that it would fall. The same 32, for whom the forecast of the previous day was untrue - did not send anything.
As you probably already guessed, on the third day the database of those who have already sent the correct forecast twice was again broken into two parts. Those eight who have already sent the correct forecast twice, again divided...

I will not tire you with repetitions, but it is easy to calculate that in the end of the database of 64 customers - there is only one broker to whom 6 (SIX) times in a row (SUB) sent the correct forecast!! to
This "lucky man" was offered to buy predictions of stock behavior for the year ahead and he made a payment of $ 2 million.
The next day, this beautiful company dissolved.