Thank you for your review and feedback- it means a lot for us. As per the 2 points you raised about the fees distributors are making and our fees.
Obviously, distributors have to make some fees reselling our vouchers that's why we always advise buying directly from us to save this fee if we provide your preferred payment option.
As per our fees, we only take 4% of the service fee while redeeming the voucher. The other fees you were charged are the fees we paid in crypto to send you this transaction (maker, taker, withdrawal fees). As you might know, buying Steem with fiat money its not an easy process because of the multiple transactions that have to be made on the background. However, those crypto fees are capped at 2.5 euro.therefore, if you would redeem a higher volume voucher you will end up paying very fewer fees because buying 10 USD is expensive even for us as exchanges and providers have limits of minimum buy for Steem (for example Binance limit is 21 euro). Your friends at Crypto Voucher