Online shopping is not the norm in Singapore, although there are specific sites that some of us love to shop at, reasons being because they're items we can't get off the stores.
I think most people in Singapore shop physically at the stores, since it's so convenient.
I've tried online ie: supermarket shopping like Cold storage, but realised the variety of items sold online are a far cry to what they have in stores physically, so I'd rather do real shopping.
However, I do use eBay for specific items I can't get here.
Hope this helps.