<prompt> Translate the following text to EnglishKwa mashirika ambayo kudhibitiwa madhubuti wanachama wao au idadi ya wanachama, kuendeleza na kudumisha msingi wao wa wanachama ilikuwa changamoto kubwa.  <response>: For the organizations that strictly controlled their membership or the number of members, developing and maintaining their membership base was a formidable challenge. 