As far as I know, Trump does not employ live bands or give away free food to attract people to his rallies. Also, people who attend his rallies have to get there on their own, they aren’t organized and bussed in.
I’ve heard many say that Clinton has a vastly superior “ground game”, but if she did, wouldn’t you think that they could turn out huge numbers of wildly enthusiastic rally-goers? The fact that she struggles, at this late date in the campaign, to get crowds numbering in the thousands on a regular basis, tells me that her “ground game” isn’t what most people think it is, and that there is little enthusiasm for her personally.
I’m surprised that Hillary got 2000!