THIS 37 SIGNALS MODEL.
IT GOOD ONE IF DO RIGHT.
IF BUILD OWN PRODUCT ORGANICALLY GROW FROM CLIENT WORK, THEN IT EASY.
IF BUILD OWN PRODUCT MAKE CLIENT WORK MORE EFFICIENT, EFFECTIVE, THEN IT EASY.
IF BUILD OWN PRODUCT ALWAYS PART OF BUILD FOR CLIENT, THEN IT EASY.
IF BUILD OWN PRODUCT IS JUST COMPETING CLIENT THAT NOT PAY AS WELL, YOU DOING IT WRONG.