That depends. I thought the same thing would happen to Uber, but they've used their rapid growth and VC money to fund lobbying efforts to change the laws around taxi regulation. As I understand it, these FF startups are attempting to exploit similar loopholes in Internet gambling laws as a short-term fix while they lobby to change the law in their favor.
Uber was never declared illegal gambling by multiple US attorney generals. They fight corrupt local politics, not well tested gambling laws. The only reason the execs aren't in jail already is because they have very well connected investors (which helps Uber as well!).