Rule should be 50/50 split early on. That maintains an equal playing field. If a chick pulls the "I'm traditional and the man pays" a) she's low quality and b) tell her you're also traditional and that she should shvt the fvck up and cook dinner. As for the uncertainty, it's why you shouldn't think too much about these things. Just filter for high interest by inviting women out and escalating. If at any point the woman stops coming out to meet you, then move on. Spin plates and follow those two rules and you really can't go wrong. All the nuance you will figure out by yourself.