Having a good EQS (Event Quality Score) with the pixel's PURCHASE event indicates that your current pixel implementation is effectively tracking purchases and likely providing valuable data for optimizing your advertising campaigns on Snapchat.

Integrating the Conversions API (CAPI) alongside your existing pixel setup can amplify your advertising effectiveness by improving data accuracy, enhancing attribution capabilities, ensuring privacy compliance, and preparing your marketing strategies for future challenges and opportunities. 

Additionally, more event counts will be recorded via conversion api compared to browser events since browser events are failed to record sometimes.