One of their largest industries (up there with tourism) is remittance processing (mostly for out of the US) denominated in US dollars. Most of their local economy operates on US dolar too, which means accepting Bitcoin everywhere offers some significant advantages:
1. Not being beholden to the whims of American banks and the American government
2. Less administrative overhead would mean being able to offer more competitive services with lower fees [1]
3. Being Bitcoin friendly would attract more crypto oriented industries to be based out of their country: offering a wider market to tap into (global remittances)
[1] "Last year, they collectively transferred nearly $6 billion, or roughly 23% of the country’s gross domestic product, and a chunk of that went to the middlemen facilitating these international transfers." https://www.cnbc.com/2021/09/09/el-salvador-bitcoin-move-cou...
Sorry, I didn't see it. 23% of GDP is the value of the remittances that enter the country. This does not mean that remittance processing (which is an economic activity) represents 23% of GDP. Remittance processing is likely a tiny fraction of GDP, since it's a low value added activity.
