Upload photos to the site directly from the mobile application. Like, subscribe to other participants, leave comments. The ability to watch those who like you, as well as the ability to upload works to the application for participants who have not passed moderation.
Вижу только две причины "чёрного минуса" - горизонт рядом с центром кадра и отсутствие земной тверди на переднем плане... Или... личная неприязнь...;)