honeypot(e.g., He was the first to realize that Olympic building projects were the real honeypot. The Black Sea resort is to host the Winter Olympics in a year’s time and construction and development costs are edging towards $40bn. Alex_Odeychuk)
a license to print money(All those hefty parking fees and fines are just a license to print money for the city. / Все эти огромные штрафы за парковку – это просто золотое дно для властей города. Getting Internet traffic on unauthorized or pirated content is a license to print money for a lot of online companies. / Получение трафика на пиратском контенте – это золотое дно для многих онлайн компаний. Dominator_Salvator)