Couldn't fit the entire question in the main bit so the explanation is here:
Working on a client's website which is hosted by volusion and also been doing SEO for them for about a year. Now we've finally got them ranking at the lower end of page 1 (around 10+) for their main keyword.
They now want to move from volusion over to Amazon Web Store
which seems to be an SEO nightmare from even my basic understanding of SEO.
From looking at the coding and the way Amazon Web store is built on top of how restricted you are from doing anything with it, I am almost certain the shop will be extremely difficult to optimise and we will have to completely change nearly all of the content.
Finally! the actual question; I was thinking I could get them to delay their move to Amazon webstore until they are ranking in the top 5 for this top keyword. Once they switch over, i assume they'll keep this ranking for at least a short while? This keyword attracts a high volume of traffic and if this traffic is clicking on the result for their website, and google sees that people are finding this website valuable (not clicking back onto google results). Will they be able hold onto this high ranking?
Basically what I'm asking is, this will be a terrible outdated badly SEO'd shop, but if a high volume of people are clicking on it and staying on it from their lingering ranking will Google just let it stay at the top?
A massive amount of gratitude in advance for anyone who tries to help with this! 