Developing your own brand will not get you 'easy money' in the short term like manufacturing for someone else will, but in the long run manufacturing for other people's brands can only yield narrow profits within a range set by those people. You can only earn high profits with your own brand and continuous innovation, in which case there will not be any ready substitutes for your products either.
自營品牌不像大量代工可以在短期內『衝量』，賺 easy money；但長遠來說，代工僅能在別人設定好的門檻中賺取微薄利潤，唯有自有品牌、持續創新，才能爭取高額利潤，且不易被取代。