The text doesn't contain a specific question that can be answered directly using just plain language processing techniques like NLP or machine learning algorithms, as it appears to be an excerpt of marketing material for MAC Cosmetics' foundation products and their associated offers.

However, based on the context provided:

- The main product mentioned is Studio Radiance Face And Body Radiant Sheer Foundation.

- There are two different types mentioned: a lightweight fluid formula providing a buildable sheer finish (likely suitable for normal to oily skin) and Full Coverage Foundation which has water-resistant properties with full coverage (suitable for all skin types, including dry or combination).

The text also provides information on the following aspects:

1. Offer details:

- The offer is subject to change without notice.

- MAC reserves the right to substitute any free item offered with an equivalent product if needed.

2. Eligibility and exclusions:

- Only authorized purchases will be processed and shipped.

- Applicable purchase amounts do not include certain items or charges, such as gift wrap fees, sales tax on some states' orders, shipping costs for egift cards purchased separately (if applicable), pending transactions where products are out of stock at the time of order processing.

3. Product availability:

- Offer only applies to in-stock items available during the promotional period.

- Products must be shipped within a specific timeframe after purchase or before they sell out completely, whichever comes first.

4. Exclusions and restrictions:

- This offer is not valid for Pro Member orders.

- Some products are explicitly excluded from this promotion; check the full terms & conditions page on MAC Cosmetics' official website for an up-to-date list of excluded items.

5. Additional information:

* The Perfect Skin Shade Finder offer requires a minimum purchase amount (currently set at $25) and is valid while supplies last, meaning once all eligible products have been sold out under this promotion, it will no longer be available.

Given the lack of specific details about MAC Cosmetics' foundation shades or how to find them in your skin tone within this excerpt alone, I'd recommend visiting their official website for more comprehensive information on finding a suitable shade that suits you best.

Find mac foundation shade