I wouldn't call it so easy to detect bots on faucets as people will always try to fin a way around it. Everytime there is some free money involved, you will have a lot of abusers and this was one of the reasons why they dropped the rewards some time ago. Interesting to see that it is now up again so maybe they have new measures put in place.
I think most bots are easily detected because their activity on the site is always different from the activity of regular users. Obviously, if someone claims free boxes 24 times a day, that should at least make the Betfury suspicious. So let's hope that the Betfury team has a good enough algorithm to identify bots, otherwise, the current free BTC box will be a godsend for abusers.