A:
This
advertisement published under the name "The Lost Treasure" as you described it is Haram (prohibited), as it involves gambling, deception, devouring people's money falsely, promoting goods and harming others. This is one of the prohibited forms of gambling mentioned in the Ayah (Qur'anic verse) where Allah (Exalted be He) says:
O you who believe! Intoxicants (all kinds of alcoholic drinks), and gambling, and Al-Ansâb, and Al-Azlâm (arrows for seeking luck or decision) are an abomination of Shaitan’s (Satan) handiwork. So avoid (strictly all) that (abomination) in order that you may be successful.
Shaitân (Satan) wants only to excite enmity and hatred between you with intoxicants (alcoholic drinks) and gambling, and hinder you from the remembrance of Allâh and from As-Salât (the prayer). So, will you not then abstain?
(Part No. 15; Page No. 199) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.