Yeah, that was just an excuse: the file is too big. They could do it if they wanted to.
The other results text files they have for download on Lotto and Daily games are only a few to several hundred KB each. The sample Hot Spot file I got for just 1 month is about 1 MB. So that is getting on the large size range, and for complete history they would have to break down by month and year, so yeah, kind of messy.
What they need is a search feature. Hopefully they will have that and also some type of recent or current day display in their website revamp. At least that is what I'm telling them.