someone posted:
…and Reb Moshe authorized the use of shtar mechira for Jewish places open on shabbos…
Please everyone bear in mind that a complex tshuva,
with many ifs and buts, can not be summarized in a single sentence.
your point was ( I suppose) that when all the criteria are met,
it may be halachically possible to do so,
and therefore the fact of the store being open may not disquallfy it from being kosher or certified. Still
a) it raises extreme difficulties for the certifier
b) people reading your post may misconstrue it to mean a general heter. the correct answer is ‘it depends…’.