I would still give her a single treat and low key praise for "pretending". Simply because at that point you essentially have 2/3 of the potty training battle conquered -- she is going to the door in an effort to notify you, followed by attempting to eliminate outside. Those two things, alone, are worthy of at least some reinforcement. The other 1/3 will come in due time.She's now started going to the door when she wants to pee which I thought was a great sign. Recently, however, she has started going to the door and when I let her out she pretends to wee! She will squat for a few seconds, leave nothing by dry paving and then look at me as if to say "where's my treat?". I don't give her treats for pretending.
On the occasions when she actually DOES eliminate outside, give her a JACKPOT of high value treats and some exuberant praise.