On the DFK vs LFK debate, it will be hard to know for sure what you get when it's advertised.
The thing is that LFK should normally involve tongue when kissing, but only with the lips. Simple "standard" peck aka lip vs lip contact is not enough. There needs to be tongue play (usually not from the SP, but from you).
Where things get fuzzy is that many SPs will simply call "simple kiss" or "LFK" indifferently a lip contact. No kissing means no lip contact at all. Few will differentiate LFK vs standard lip kiss.
It's a bit like the "nuru" trap: most punters don't know that a proper nuru massage (using Nuru gel, etc.) is, and like 90% of the girls I've seen will not differentiate nuru and body to body. [and to go further down the rabbit hole, few know how to properly do a body to body massage, they will simply stop at naked boobs rubbing on your back].
It's hard to go into that level of details with the person dealing with comms, and might be time wasted when talking directly to the girl.
That's also why I mostly go and see the same girls, where I know that we have a common understanding on the service.