It is based on what is "available", not necessarily what happens with any individual.
That is where "ymmv" comes in to play

Often providers will start a BBBJ but be stopped by the hobbyist since older one pop guys like myself want to save the pop (or she does it do get you hard enough to place on the protection)  - I enjoy the BBBJ, but if a provider has me aroused, will often stop it quickly and move on to other activities - that is sufficient to merit the extra point, but others may not view it as a BBBJ unless she is willing to follow thru to completion.  You need to read the reviews and pm if you want to clarify how far she is willing to go.