This is what it states in the middle of the article:
"Around the Idomeni camp, canteens have mushroomed to sell food to the refugees. Wandering merchants peddle cell phone SIM cards. Jehovah's Witnesses have set up stands hoping to spread their version of God's word -- they distribute brochures in English and Arabic. There are reports that restaurants in the area sell meals to Greeks and refugees at different prices. Taxis at a stand along the road that offer to take people to the nearby town of Polykastro reportedly overcharge refugees significantly."