Abe Diaz created a service called Pridefy that allows users to share their pride by sending a photo with a rainbow filter added via Twilio MMS. The service uses web requests and Azure Blob Storage to achieve this. Abe followed several steps to create the service, including changing the opacity of an image, scaling it, and overlaying it on top of another image. He then created an MVC controller to handle incoming images and return TwiML markup with a link to the uploaded image in Azure Blob Storage. The service allows users to share their pride and adds a rainbow filter to any image sent via MMS.