Affiliate Marketing Secrets

I saw that an online retail website I frequent has added the Amazon Checkout option when checking out. This site is not affiliated with Amazon.
If you choose to check out using the Amazon Checkout option, a small pop-up window opens, asks you to log into your your Amazon account, and then takes you to what seems to be the final step in the checkout process (choosing payment options, shipping options, shipping address, etc.).
I would like to know if this feature allows you to use an existing Amazon gift card balance that was applied to your account prior to you using the Amazon Checkout feature on the 3rd party site.
For example, let’s say I got an Amazon gift card for $50. I then applied that card to my Amazon account and so, my Amazon gift card balance (on my account) becomes $50. I then go to a 3rd party site that had the Amazon Checkout feature, purchase something, and use the Amazon Checkout feature. Will I be able to use my gift card balance of $50 towards my purchase?

My company currently only has a very basic online retail website, and we would like to redevelop this to boost our online sales. We are a small-mid sized re-distributor for various manufacturers, and currently handle the vast majority of our orders via phone/fax.
We need a customizable Ecommerce platform that will allow us to create a very functional website with a lot of personalization for the users . We are in a unique niche, and our users require some non-standard features & ordering processes that we would need built into the site.
I am looking into various solutions. Ideally, we would like a system that offers CRM, accounting, inventory, POS integration, and other enterprise management tools.
I’ved looked into Oracle, but frankly, it all confuses the hell out of me. They offer so many products/solutions, i’m not sure if this is even what we need. Do they offer an ecommerce platform, or how would it be integrated into a website?
As a redistributor we only currently carry a small inventory of product. Generally we receive orders, put in an order to the manufacturer, receive the product, and then ship it almost immediately. However, as our online business grows, eventually we’ll expand our inventory to hold products we find are most desired through sales analysis/metrics.
Do you have any suggestions on good enterprise software for us? Have you had any bad experience? Is Oracle the way to go? Where can I find a good developer/IT guy that would aid in the implementation of this?