Last month Apple.SE had 1k views/day on average but this week it has decreased to 500. Does anyone knows the reason?
I suspect part of it is that it's currently the weekend - there is always a noticeable drop in views on Saturday and Sunday.
However the addition of all the gadgets questions has complicated matters:
views_per_day there is the sum of all views (as determined by unique IP visits within a reasonable interval) on all questions (including deleted, closed, migrated, etc.) over the number of days the site has existed (as determined by the creation date of the oldest question).
Now that we have much older questions on Apple.SE we have 50 or 60 days at present of very, very few views that previously did not exist at all.
Source: How is views/day calculated? on MSO as I believe they adjusted it over this past week.