Is a commercial project, financed with capital derived from the sale of labor visas, and which generates lawful profits, considered entirely unlawful and must it be shut down?

Selling visas is impermissible because it is a sponsorship (kafalah (definition)), which is a gratuitous contract, not an exchange-based one. One must repent from this transaction and return what was taken from the workers, deducting the costs incurred in obtaining the visas. There is no requirement to dispose of the project and its profits; both can be utilized. If there was a lease contract (ijarah (definition)) with the workers, it must be adhered to unless the workers agree to its annulment. Otherwise, nothing is obligatory towards them, while observing labor laws.