Listing photos and descriptions

My observation is that the Aussie specific site I joined was terribly disappointing photo and description wise. I expected the THS site to have the same number of photos for an Oz sit as they do for any other country. Reading the listings I am finding this is not so. I believe THS require a certain number of photos now but from what I have seen they are clearly not enforcing this. I was just curious as to why this just appears to apply to sits in Oz, whichever platform they are on.