I know people who used to do it every turn. I never did more than every couple turns. But you can see there is an issue here that some people invest a lot of time and effort into their countries only to have it destroyed on a Saturday or Sunday by someone who spent a tenth of the time into their country themselves.

You saying that no one cares who wins anyway is probably true now, but it isn't always, just a few months ago we had good competition and people were taking great pride in tweaking their strats to outnet the competition. Granted it was shortly after extensive game changes and that might have made it more interesting.
But still we had those bouts of good competition here before over the years when there wasn't big game changes, there isn't a pattern for how they start, but there damn sure is a pattern for how they end; A couple of griefers play every week with the intent to destroy said competition.