Diaper Raffle? Yay or Nay?

Breezy❤️
Yes? No? Is it tacky or greedy?
I think I posted about this before but I can't find it. 
Any of you ladies have a diaper raffle at your shower or throw a shower that included a diaper raffle for someone else?
My mom INSISTS that if I put a diaper raffle request along with my invitations, that "people won't buy you a gift and diapers, they'll just go for the cheaper option of buying some diapers."
PLEASE tell me if any of you had a diaper raffle at your/someone else's shower and if you in fact did receive diapers in addition to gifts or if you only got diapers. 
I know I probably sound greedy, but hey. If i don't have to buy as many diapers-I'm all for it. 
P.S. I just had a thought- did you register for diapers/wipes? Like is that something you put on the registry or is it just a given that you'll need them?

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