Ah..the good old days. I agree it seem harder these days to get FS from MLs. Maybe I have not been as active. Years ago, I would have at least one or two regular MLs with whom I get FS even when it was not on offer by the establishment. Not anymore.
Thinking back, FS was never offered and never on the first encounter. I usually find a ML that I like. Visit her a few times. Build rapport and I usually get FS. I do not recall any MLs quoting a price for the FS. From the first FS, I made the point to tip generously.