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Marketplaces either act as brokers, charging providers commission for its services or they act as a final sellers, adding markup to vendors offer. Payments are either processed directly between sellers and buyers, or third party payment provider is being used. Payment processing in this scenario is easy and can be simply done by a platform itself. Depending on the country, different payment methods and providers might be used. PayPal is the most popular global payment platform, supported in almost every country, the API is easy to implement, and you can create an account very quickly.