Both Ponzi schemes and pyramid schemes eventually bottom out when the flood of new investors dries up
Freebitco.in uses a small part of the income generated (profit) to pay interest and referral commissions and does not have any similarity to a Ponzi.
Thanx for proving the point that the site is a ponzi beautifully. Just replace the word "investors" with "gamblers" and there you have it, ponzi scheme. Lucky for you BTC is carrying you to the top. It's dragging lots of people/projects to the top whether they want to or not.