no, no minimum requirements.
Renderosity takes a 50% split from NON-Exclusive Vendors
45% from Exclusive Vendors
and progressively less from the 30 Top Seller. Top Sellers generally upload at least once a week.
Please see https://www.renderosity.com/how-to-become-a-vendor-at-renderosity-marketplace---all-the-info-you-may-need--cms-19332

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Andy!