Is it permissible for me to benefit from the profits of a commercial shop established with a visa that I obtained for someone with whom I agreed to share the profits, and is it permissible for me to sell other visas to the same shop to pay off debts and perform the Hajj pilgrimage?

It is impermissible to sell visas or for the worker to share profits in exchange for the visa and sponsorship, because this money is unlawful and must be returned. The visa and sponsorship are a permit and authorization from the government to bring workers to work for you. Sponsorship is a contract of donation and assistance, not a contract of exchange. Taking money in return for it is consuming wealth unjustly. Moreover, it involves violating the state's conditions.