What is the ruling on using a MasterCard from Payoneer, if the company has a branch and funders in Israel, bearing in mind that the beneficiary will earn money from using it?

The basic principle is that it is permissible to deal with non-Muslims and their companies, provided that the transaction does not involve anything forbidden or assist in it. However, companies that scholars and leaders have decided to boycott due to their aggression against Muslims and their sacred sites are forbidden to deal with. If your transaction with the company involves purchasing prepaid cards according to Sharia guidelines, there is no harm in that. These cards either mean that their owner has an account with the issuing authority, which is permissible, and the authority may charge service fees. Or, if there is no account, their purchase is considered currency exchange (sarf), which requires the conditions of exchange: immediate possession (al-taqabud) and equality (al-tumathul) if the currencies are the same, and immediate possession without equality if the currencies are different. Immediate possession can be actual or constructive. One form of constructive possession is the bank entry of a sum of money into the customer's account.