If they send 700,000 people an email asking for 0.015 BTC, that's just a genius last step to get more money out of the people they scammed. I expect a large part of that 700,000 people to fall for it, because they fell for the ponzi scam in the first place. So if 50,000 people pay, that's an easy 750 BTC again for the scamsite!
totally agreed with that , making some site with basic invest for sure its not easy im believe all HO team smart people.
thats the point for send email notification to all user its easy lol