I've been on the other side of this, so I thought I'd offer a different perspective. I've had people in my life that I no longer wanted to have a relationship with. I've distanced myself from them, but when they reach out, sometimes I reciprocate for one reason or another. I don't think I'd call it breadcrumbing, because I am not the one who makes the effort. But one such person in my life is a family member who has Narcissistic Personality Disorder and I need to keep distance for my own sanity but have not decided to cut this person out completely because of family dynamics.

I also had a friend who became very clingy and needy of my time after she went through a divorce. With the other obligations I have in my life, again I cut off most of our communication, after attempting to address the issue to no avail.

I'm not saying this was your situation, though it certainly could be since she's clearly upset about the acting group (which I feel like probably could have been salvaged with community donations, city support, or similar), but maybe she is making it clear that she is no longer interested in a friendship, but hasn't fully decided to end it completely.

Either way, you're right to set boundaries. Just thought I'd offer up my own experiences.