(a) people to compliment you by saying wow, you have lost a lot of weight,
(b) people to compliment you by saying "you look well".
(c) people to say nothing at all.
I am not on WLI myself.
I met an acquaintance yesterday after some months, and she was about half her size. I went with option C as I was too cowardly to say anything, but she did look great. May not have been WLI, but I think it is, as the difference is quite marked. If she was a close friend, I might have gone with B.