Originally Posted by CunningStunt

Every single day without fail, one of my sponsors doesn't allow logging in for the last 30 minutes of the day.

Why?

Do they turn off the affiliate area, maybe even stop tracking hits / sales, diddle the figures, and then turn it all on again as the day move into the next?

After the responses here I'm going to ask them. That would be a neat way to trim a few sales for sure.