(That's not entirely snark!)
Minor annoyance, but I'm not trying to scam anyone.
I wonder what your definition of a scam is, because this kind of thing fits my definition of a scam pretty well.
> The conversion rate is substantially lower if I put "coming soon."
Conversion rate is important and all, but it's also important to consider the first impression you're making on your potential future users.
Minor annoyance, but I'm not trying to scam anyone.