Usability testers are asked to perform tests based on their demographic profile (education, knowledge of the web, age, social media use, etc.). They are then given questions to address and/or tasks to perform, such as registering on a website and then providing feedback online. Reviews usually take about 15-20 minutes and earn typically about $10 each. After completing a review, testers are not paid until the client accepts their feedback. Work can be rejected and unpaid for technical problems, lack of detail, or other issues the client determines.
Bloggers are typically people who enjoy a particular topic and enjoy writing about it on a semi-regular to regular basis. If you have something you are passionate about, or are an expert in a particular area, you can consider starting a blog. Blogs are a great way to: teach people about a particular skill, entertain, or share about life experiences.