I assume that the sales of FH and AS was both a vindication and a disappointment.
Through introspection, we all know how it feels to grasp a complex subject, and then to explain it to someone in as lucid a way we can, and then feel... what?
If the other person's response shows that they completely get it, it feels really good. It gives us psychological visibility of being understood and a confirmation of our competence in putting our point across. And, we feel a kinsmanship that comes with the feeling that all's well if others can get this too... a bit of a "benevolent universe" affirmation".
OTOH, when people do not get it, despite our thinking that we were lucid, and when we see them evading our key points and arguing against strawmen, it's just the opposite feeling. Personally, I label a huge conceptual disconnect as a "epistemological chasm". It's the feeling that "I will never reach you" (and it can often be felt by both sides, not just one). That in itself, is a dent in the feeling of visibility and the feeling that world is a great place if others can "get it"! Adding obvious misrepresentation into the mix just makes it more depressing.
I expect Rand hoped that many more would see things her way if she really laid it out. After all the focus, integration and effort that went into AS, I expect she would have been disappointed seeing that Objectivism was still somewhat niche even years after publication. Still, she had the affirmation of great sales, and ardent students. So, I assume she would have felt that she'd done things right, and that some people do get it, but fewer than she'd hoped for.