Consider the following theoretical case. A Jew owns a number of supermarkets where he pays a set monthly fee to a service company that has non-Jewish workers come by and make regular check-ups on the ...
Others here have raised the general questions of whether or not various forms of Internet-presence (belonging to a Jew) can remain open on Shabat: blogs/websites, in general e-commerce sites, in ...
Many shuls have the practice of selling kibbudim (i.e. aliyot, hafotrah, opening the aron, etc.) on major holidays, usually via auction. I've been to some shuls where this is done every shabbat. A ...