Yes. For instance, one young person who started as a Kingdom publisher when he was 12 years old became inactive at the age of 15.
إِلَّا أَنَّهُ عَادَ لَاحِقًا فَصَارَ نَاشِرًا نَشِيطًا ،‏ وَهُوَ مُنْخَرِطٌ فِي ٱلْخِدْمَةِ كَامِلَ ٱلْوَقْتِ مُنْذُ أَكْثَرَ مِنْ ٣٠ سَنَةً .‏