I'm so glad you can see it too. It's like she has a two tiered system, anybody can donate, but only certain people can come to her events. Although if she's paying money for people to come to her events they probably aren't donating a lot.
She just wants their votes, and if she invited all of them just think about the expense of interpreters. Do you really think she'd find value in that considering how she repeats herself or her word salads?