The July issue of Learning to Crawl (the .# issues of Amazing) was #11 on the Diamond charts for July, just missing the top 10. So I would say the numbering is helping them sell.
How can you possible know that? I suspect it's more because it's the regular writer, and it has clear tie-ins to the current story.
I don't think numbering nonsense effects sales much. Sure, #1s sell more, because people like 'jumping on' points, but to be honest I think most extra sales of #1s are speculators. In 5 years, once it's clear none of these re-boots hold any value, #1s will stop.
Hasn't so far, and they've been doing it for much more than 5 years.
I hate to tell you this, but you are a bizarre psychological abnormality. --Reptisaurus!