My cousin is in a cult, which she doesn't acknowledge or label it as; but everyone knows that's what it is. They have conventions all over the U.S. that she attends. Her entire social network are members. I was supposed to visit her out of state twice, but due to poor finances, I postponed both visits. I'm relieved I had to, b/c I was worried what would happen during my visit with her; would she try to convert me?

How close are you to your family member? Do you live in AZ near her? Or, are you in Ohio with the rest of the family?

If the research and reviews you've pulled up online reveal it to be a cult, then it is. You could always attend one of her cult's meetings to see what it's like, and then use that as an opportunity to voice your concern. If you don't go and voice your concern, she'll just accuse you of not understanding. But if you attend a meeting, she'll have to acknowledge that your concern is credible (it's credible without you attending a meeting b/c you care about her well-being, but in her mind, since she is vulnerable and impressionable, any concern from "outsiders" is viewed as judgment).

Acknowledge your concern, let her know you'll always be there for her if she decides to join it, or leave it. If she knows you'll be a neutral source of support, she's more likely to remain open with you about it. You can covertly monitor her involvement with that group by letting her bring it up in conversation. If it is Scientology, well, good luck. That is a scary organization. There's a center in nearly ever city/state, and country. There's one in my city and it gives me the creeps every time I have to go near it.