I would think once in a while they'll be ok.
I took in a package of 100 calorie cookies, they said "not on plan, use our cookies" so I bought 10 packages of their cookies. Then at home my husband and I laughed because it was nearly EXACTLY the same as the LAWL cookies, the ONLY difference was their cookies had 1 extra gram of I think protein (I could be wrong with the protein - but there was 1 g or something difference that the LAWL had more of than the 100 calorie cookie snack I had taken in).
I think they're programmed to say no to most snacks, they have said no to every thing I have taken in there but I lose on average 2.3 pounds a week. So I must be doing something right, even though I eat their forbidden snacks.
So I'd say try them, have only 1 or 2 a week and see how your week goes. If you feel that you're getting too much sugar in them then go for an extra 20 min walk at some point throughout the day, that will balance it off.