I checked things out.
It is a generic implementation of quick exchanges without signup (coin swap).
I liked that it has a decent list of coins to swap for, specifically including Tether and on Tron chain (TRC20) which I prefer using myself.
What I didn't like is what I don't like in similar services as well. It's the hidden fee through the exchange rate.
For small amounts this fee goes through the roof. For example to sell the minimum BTC amount which is roughly 0.001286
BTC which should be worth $80.31 you'll only get $76.33 ($77.83 - $1.5 network fee - ?? service fee) which translates to roughly 3% fee.
I couldn't figure out what the 0.7% service fee was and how it is calculated in addition to what is already being deducted through the lower exchange rate.
And majority of the links at the bottom of the page are broken which doesn't help the business (the site looks rushed and incomplete/broken).
They show the link to the page you are currently on. For example if you are on
https://priamex.com/en/how-to-use page the FAQ link shows
https://priamex.com/en/how-to-use#Thanks for your analysis.
Actually, the fee isn't 3%, the earlier calculation mixed different things together, which distorted the percentage.
The exchange rate itself is a form of the fee (the buy/sell spread), and separately there's a network fee (~$1.5) for the blockchain transfer. That's not the service's revenue, it's a fee paid to miners/validators, charged by any exchanger or exchange. Adding the network fee together with the service fee and calling it one combined "percentage" isn't accurate, because the network fee doesn't scale with the transaction size: the smaller the exchange amount, the more it visually inflates the percentage, even though it's actually a fixed amount rather than part of the stated service fee.
The stated service fee, 0.7%, is already factored into the rate shown to you at the time of exchange. The apparent extra cost on small amounts is mostly driven by that fixed network fee, not by an inflated service percentage.