I’d guess the analytics program used (I am not familiar with mentioned awstats before I now checked it from Wikipedia) is maybe somehow interpreted or configured wrong in this case. Maybe it’s 1,5 million page views if the site is large that would be possible number…maybe. But I tend to agree with others that 1,5 mil visits can’t be right, since for example Google Trends is not listing the site and it lists every site with over ~2,500 unique visitors per day when searching for websites and 1,5 mil visits/month would definitely mean at least 10,000+ uniques per day.
Usually 1.5 mil visits per month mean about 500,000 uniques per month (from public stats listing sevices I checked for average ratios between total visit/unique visitors) -> 16,000 uniques per day with 1,5 mil total visits per month. Even if the site in question would somehow be much, much below average in total visits/unique visitors ratio, the number could never be under Google Trends listing criteria (~2,500 uniques per day), when the average ratio would result into about 16,000 uniques per day.
For example this casinoaffiliateprograms.com makes the Google Trends listing barely with a bit over 3,000 uniques per day (about 300,000 total visits per month if this is about an average site in terms of uniques/total visits ratio). So gamesandcasino should be about 5 times more popular site than this casinoaffiliateprograms.com to have those kind of visit numbers…I don’t think so.
So I’d recommend you to check the configuration of your current web analytics program you mentioned about. There’s something wrong for sure in the reports it is producing currently.