[magicofpi]

Yes, exactly. Perhaps the 4 weeks approach is to link it with the existing home delivery system (which is also calculated by week), but it sounds strange in practice.

I guess we'll see how it turns out, though. Maybe most customers won't actually mind these irregularities.

[chris_vannoy]

Actually, my guess is the every-four-weeks bit is to goose revenue.

With monthly, you're getting paid 12 times a year. With every four weeks, you get paid 13 times.

It's a nifty little sales trick. Most people (including me) automatically round four weeks up to a month before thinking about it.