How does one compete in a exclusively Jewish market (Judaica, kosher food business etc.), in the face of issues like taking away a competitor's marupia?
closed as unclear what you're asking by mevaqesh, Gershon Gold, Isaac Moses♦, Scimonster, Avrohom Yitzchok Nov 9 '16 at 19:55
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Marupia only applies if you specifically go after a competitors exclusively loyal customers. Marupia would not apply if you advertise to the general public. Furthermore even in a case of only a Jewish business there are those to be makel on.