If their past actions give us any guidance, they wouldn't turn to scam even if they run out of funds. Their other project freedogecoin had too many botters/multi accounters and they couldn't deal with the thieves since they are only 2 people but they still let everyone to withdraw their funds.
I would expect the same thing for freebitco.in if the same day arrives one day.
how to adjust once some big flow happened around the industry. If you are just collecting from faucets and referrals and you can continue as it is then let things to continue, we never know how far this business will take and how big your stake will go after working for it.