SANHA has very immorally advertised a sexual product to give impetus for even commission of zina.

Answer

SANHA halaalizes carrion, hence they are so utterly shameless to advertise immorality. The advert pertains to a zina product. SANHA is displaying swine tendency. Shamelessness is the salient attribute of pigs. All the haraam carrion which SANHA halaalizes has destroyed every vestige of Imaani conscience in their vile molvis who are worse than khanaazeer.

considered as valid in Islam?

A. Your understanding is flawed. It is not correct. A Nikah performed in terms of the Shariah may not be labelled ‗prostitution'. It is not mu'tah. A mu'tah is a temporary union. The time is fixed. In the type of agreement you have explained, the Nikah is not arranged for a fixed time period. The parties do have the right to waive their respective rights and obligations. However, despite the initial waiver, they also have the right to reinstate their rights. Although the form of marriage explained is not advised nor encouraged, it is nevertheless valid and permissible, and may not be called prostitution.