The problem with most of these merchants that are accepting Bitcoin is always the same. They only accept Bitcoin as a alternative payment, if you work through some kind of payment processor and in this case it looks like they are using BitPay? (or are they just using it's market price for Bitcoin)?
They are only interested in the Fiat currency and not the potential of the new alternative currency. The fact that "cancelled" transactions are refunded in Euro is a clear indication of what their main goal is with Crypto currencies.

Also, do they offer some kind of discount for Crypto payment to promote it? No...

Been thinking for this since I heard bunch of small businesses started to accept bitcoin or other cryptocurrencies as paymetns (are you sure that they are just alternative payments? Is there no any merchants who really accetps bitcoin not just to be alternative payment method but to be a stand-alone?) I mean, they have an fixed amount for their products or services, not dependent on the current value of fiat currencies.
But this will type of payment method is lethal to the business itself since bitcoin has high volatility, making the income of businesses less or higher.