AA is not a cult because...
you can leave anytime and come back if you want, or not if you don't (I haven't been to a meeting for years, but if I wanted to go to a meeting this evening I'd be welcome there)
you don't have to subscribe to any particular religion (the 'God' in the steps is the 'God of your own understanding' which can be Jesus, Buddha, Krishna, a lamp post, or a belief in human goodness, or whatever. Plenty of atheists work the steps just fine.)
you don't have to pay. the pot is passed around for contributions every meeting to pay towards the room rent, tea, coffee and biscuits, but no-one is co-erced to contribute, and you can put in as little as you want. £1 is average, but there is no obligation to contribute
there is/was no individual, or small group of individuals, getting rich due to having founded AA. On the contrary, Bill W was far from rich. Some people might get rich from founding treatment centres, rehabs etc but they are not part of AA.
all local groups are self-governing - they send a GSR to regional meetings etc. but nobody tells each group what to believe or say at meetings. If someone wants their local meeting to change in some way, they suggest it, there's a group conscience (a vote in AA speak!) within the local meeting and the group goes with the majority view.
and so many other reasons.
People facing the admission that they are alcoholics are frightened, confused, defensive and occasionally paranoid. The idea that AA is a cult that wants to convert them fits nicely into that mindset. Years ago I sponsored a woman who left a message on my answerphone saying that she'd read a book about how AA was a cult and so she didn't want a lift to the meeting this week. So I didn't drop by - I don't believe in frogmarching people into meetings. Next time she called it was a long drunken rant into my answerphone. I heard from another AA member that he'd seen her in hospital after a suicide attempt - she'd asked to see someone from AA but then sent him away. I went to the hospital but she'd gone already. I suspect she's dead. It makes me so sad.
I don't go to meetings any more, but I got sober in AA and am grateful to the program and the people I met there for my recovery.