So I have been lurking around in some subs, and screenshots of girls ghosting, leaving on read and replying very infrequently are very common. I get it that these girls really aren't interested in the guys from the very beginning, but do you girls still do this for guys you are interested in and have full intentions of pursuing from the start?

I read about matching the girl's energy in texting - text less frequently if she does, write shorter texts if she does too, etc, but at what point do we guys need to call it quits and just unmatch / leave you permanently?