sox, welcome to the forum and thanks for making your first post!
To answer your question: Some that advertised that way strictly does not offer full service (i.e. sex). But almost all offers happy ending via handjobs or "prostate massage".
Some that advertised "No whole package" do not offer sex but might to selective punters - either they are regulars or customers they feel comfortable with. It's really touch and go (no pun intended!).
As for BJ ending, I guess you will need to test the water, and report back to us once you do! Happy mongering and looking forward to your first report!