No, Fiverr is not going to get blocked in Pakistan because Pakistan recently registered Fiverr freelancers officially. And for Fiverr, Pakistan with 2nd greatest traffic in market and highest number of sellers they are no possibilities of getting Blocked in the region. For "Start selling" or "Continue Fiverr" options yes I clicked on Start selling which showed that message of Fiverr Business not available for the country and for Continue Fiverr, it's just an option to get back to the homepage as it says "Continue Fiverr".