What's the problem? Though it's definitely in the 'unlucky' side, losing 13 times in a row is definitely a possibility. It's not like the possibility of you winning the gamble goes up after every loss.
Also, with freebitco.in, the possibility of you winning a x2 multiplier is 47.50% not 50%.
not quite, i have had more rounds today, i lost 10 times on another round , but i won 1 times and recovered my lost satoshi, say wathever u say this is not a provably fair game... also a friend played some months ago and he lost 17 times in a round, for y'all if you dont want to risk your satoshi, dont bet on this website.