If you build your site first and then buy sbi that defeats the whole purpose of the major benefits of the product. The point of buying sbi is that it has a powerful brainstorming tool that tells you what domain and topic to choose. well let me rephrase that... it doesn't TELL you. You do the research and decide what's best for you.

Then you start creating your pages and as lisa said it analyzes every page to make sure you are optimizing it for maximum traffic. If you use another web host then you miss all these benefits.

SBI is not just for promoting your site, it helps you with every step from the beginning. Don't waste your money if you plan to build your site first and then buy it. You'll be missing the greatest gems!

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Just call me Max.