Hi, Thanks for reminding me of my missing point. Yes it is risky but in a minimal level.
As i can tell you the exchange has been launch and couple of individuals such as I benefit from it. I convert a couple of hextra coins to bitcoins when the Live start. Currently they are on maintenance and as far as i can tell everything is shutdown and there are no ways to buy their coins.
Possibilities will be is when they start running their program on 9th of November and the exchange will be on again. prior to this there are no other risk since you cant buy their coins cause they are on maintenance.

Regards to your bitPetite as far as i know it is a HYIP program that dont have their own CryptoCoins.
Hextra have their own coin value while bitPetite is just a high yield investment program. So it is a totally different Concept.
ThankYou for the reminders.. much appreciated.