This post outlines a simplified method for integrating Account payments into Commerce 14, detailing a minimal working path without extensive exploration. It covers creating a Payment Option and Payment Gateway, registering them in the Admin UI, and optionally persisting Account numbers in a custom database table.

Optimizely Commerce 12+ automatically validates line item prices based on catalog data, which can overwrite user-entered prices for donations or custom amounts. To avoid this, you can extend the IPlacedPriceProcessor to preserve user-defined prices by using a custom flag. This method maintains the pricing system's integrity while accommodating unique business models.