5 day entry guarantees entry period straddles a Friday night, Saturday or Sunday which is when much of the playerbase is available to put in a ticket. This makes it more accessible. And the 4 day pickup is reasonable since if you put in a bid during that time period, you'll probably make time to login and check if you one. And 9 days means that lottery doesn't always start/stop on the same day like it would if it was 4/3 or 5/2 or something.