Converting a 20 USD Amazon gift card to cash is an action that many people might consider for various reasons. However, it's important to understand the implications.

Legally, in most regions, directly converting a gift card to cash through unauthorized means is against the terms and conditions set by the gift card issuer. Amazon gift cards are designed for use within the Amazon ecosystem for purchasing goods and services. Any attempt to bypass these rules can lead to serious consequences. It could involve legal action from Amazon or financial institutions involved in the transaction.
Ethically, such conversions also raise questions. Gift cards are often given as a gesture of kindness or for a specific purpose related to the Amazon platform. Using them to obtain cash outside the intended use undermines the spirit of the gift. It can also be seen as taking advantage of the system.
In conclusion, while the idea of converting a 20 USD Amazon gift card to cash might seem appealing, it's not a practice that should be pursued. It's both illegal and unethical, and can cause more problems than it solves. One should abide by the rules and make legitimate use of the gift card within the Amazon shopping environment.