Refresh Dedicated subscription page post LA launch

What does this MR do and why?

This page is updated regularly, we should update the language so that it is clear, along with additional details on what is and isn't available.

In addition, we should link to the direction page as the SSOT for future plans. Direction pages are more easily updated, the canonical location for our future plans, and this subscription page can also be referenced as the product definition.

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MR acceptance checklist

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