Change the product ID when user submits the CRED form with CRED commerce settings.
There isn't such a built-in feature within CRED commerce plugin, but you can try with some PHP codes, for example, when user submit the CRED form for creating the post, use action filter hook "cred_commerce_add_product_to_cart" to trigger your custom PHP function, in this function, change the product ID when specific condition is satisfied.
Filter that allows to dynamically alter the product associated with a CRED Commerce form, when adding to cart.
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