added warehouse examples and TDP qualification desc

Author: rachlanders

src/guides/usage-and-billing/twilio-developer-plan.md

@@ -4,38 +4,41 @@ hidden: true
 ---
 
 
-The Twilio Developer Plan allows you to collect and process your data at scale, consolidating your data from up to 3 sources into a single warehouse for complex querying. 
+The Twilio Developer Plan allows you to collect and process your data at scale, consolidating your data from up to 3 sources into a single warehouse for complex querying.
 
 ## How is this offer different from Segment’s Free Plan?
 
-The Twilio Developer Plan allows for 10,000 Monthly Tracked Users (MTUs), while Segment’s Free Plan limits MTUs to 1,000. 
+The Twilio Developer Plan allows for 10,000 Monthly Tracked Users (MTUs), while Segment’s Free Plan limits MTUs to 1,000.
 
-The Twilio Developer Plan is limited to 1 warehouse destination, while all other Segment plans also allow you to send data in real time to more than 300 destinations (all the analytics, marketing, advertising, and A/B testing tools you already use). 
+The Twilio Developer Plan is limited to 1 warehouse destination, while all other Segment plans also allow you to send data in real time to more than 300 destinations (all the analytics, marketing, advertising, and A/B testing tools you already use).
 
 |                              | Twilio Developer Plan | Segment Free Plan          |
 | ---------------------------- | --------------------- | -------------------------- |
 | Monthly Tracked Users (MTUs) | 10,000                | 1,000                      |
 | Destinations                 | 1 warehouse           | More than 300 destinations, including the analytics, marketing, advertising, and A/B testing tools you already use |
 
 
-Need more destinations or more MTUs? Upgrade to the [Team Plan](https://segment.com/pricing) for unlimited destinations and scaled MTU pricing. 
+Need more destinations or more MTUs? Upgrade to the [Team Plan](https://segment.com/pricing) for unlimited destinations and scaled MTU pricing.
 
+## How do I qualify for the Twilio Developer Plan?
 
-## What is a data source? 
+You must have an active Twilio account to sign up for the Twilio Developer Plan. Active Twilio users can sign up for the Twilio Developer Plan here: https://www.segment.com/twilio-developer-plan.
 
-In Segment, you create a source for each website, app, or cloud-based tool that you need to collect data from. 
+## What is a data source?
+
+In Segment, you create a source for each website, app, or cloud-based tool that you need to collect data from.
 
 For more information about data sources, see the [Sources Overview](/docs/connections/sources/).
 
 
 ## Warehouse Destinations
 
-A warehouse is a central repository of data collected from one or more sources. This is what commonly comes to mind when you think about a relational database: structured data that fits into rows and columns.
+A warehouse is a central repository of data collected from one or more sources. This is what commonly comes to mind when you think about a relational database: structured data that fits into rows and columns. Some examples of data warehouse that are available on Segment are [PostgresSQL](/docs/connections/storage/catalog/postgres/), [Snowflake](/docs/connections/storage/catalog/snowflake/), [BigQuery](/docs/connections/storage/catalog/bigquery/), and [Redshift](/docs/connections/storage/catalog/redshift/).
 
-For more information about warehouses, see the [Data Storage Overview](/docs/connections/storage/). 
+For more information about warehouses, see the [Data Storage Overview](/docs/connections/storage/).
 
 
-## How are Monthly Tracked Users (MTUs) calculated? 
+## How are Monthly Tracked Users (MTUs) calculated?
 
 Segment counts the number of **unique** `userId` values, and then adds the number of **unique** `anonymousId` values that were not associated with a `userId` during the billing period. Segment counts these IDs across all calls made from all sources in your workspace, over a billing month. Segment counts each user once per month, even if they perform more than one action or are active across more than one source.
 
@@ -55,10 +58,9 @@ If you exceed the 10,000 MTU limit twice in a 6-month period, Segment locks acce
 
 ### How do I get more out of Segment?
 
-Segment helps you simplify data collection, personalize user interactions, protect data integrity, and respect user privacy. Explore the [Destinations Catalog](/docs/connections/destinations/catalog/) to see all the tools you can send data to once you get data into Segment. 
+Segment helps you simplify data collection, personalize user interactions, protect data integrity, and respect user privacy. Explore the [Destinations Catalog](/docs/connections/destinations/catalog/) to see all the tools you can send data to once you get data into Segment.
 
-On Business plans, Segment also offers two add-on products called [Protocols](/docs/protocols/) and [Personas](/docs/personas/).   
+On Business plans, Segment also offers two add-on products called [Protocols](/docs/protocols/) and [Personas](/docs/personas/).
 
 - **Protocols** helps you automate and scale the [data quality best practices](/docs/protocols/tracking-plan/best-practices/) to improve data quality and trust across your company.
 - **Personas** is a powerful personalization platform that enables you to create unified customer profiles in Segment, to build and enrich audiences, and to activate audiences across marketing tools.
-