Sometimes I go to the site to try my luck at the expense of a faucet. Quite often I see a message that I need to switch from alternative cryptocurrencies to bitcoin to use the faucet, but I never used alternative cryptocurrencies on fortunejack. Usually, when I get this message, I just try again in a day or two. So my question is: why do I get this message?

Hi xandry,
Indeed it is a good try to use faucet to test your luck. They are giving like 523 satoshi for every claim 5x a day.
You can try to just reload the page, at least that is what I do whenever I get the message, or you can just let it load for a longer period.
I have no idea why it takes sometime to load but I assure you that what I said above works. Well, at least for me it does.