Freelancing: Offer your skills and services on freelance platforms like Upwork, Freelancer, or Fiverr. You can provide services such as writing, graphic design, programming, or virtual assistance.

Online Surveys and Reviews: Participate in online surveys, product reviews, and market research studies on sites like Swagbucks, Survey Junkie, or Vindale Research.

Content Creation: Start a blog, YouTube channel, or podcast and monetize it through advertising, sponsorships, affiliate marketing, or selling digital products.

E-commerce: Sell products on platforms like eBay, Etsy, or Amazon. You can sell new or used items, handmade goods, or digital products like ebooks or courses.

Virtual Assistance: Provide administrative or technical assistance to businesses or entrepreneurs remotely. Platforms like Time etc and Zirtual can help you find clients.

Remote Customer Service: Work as a customer service representative for companies that offer remote positions. Websites like Remote.co and FlexJobs list remote customer service jobs.

Online Tutoring: Teach a subject you're proficient in on websites like Chegg Tutors, Tutor.com, or VIPKid.

Stock Market Trading: Learn about stock market trading and invest in stocks, ETFs, or other securities through online trading platforms.

App and Website Testing: Get paid to test websites and apps for usability and bugs. Sites like UserTesting and Userlytics offer such opportunities.

Affiliate Marketing: Promote products or services and earn a commission for every sale or lead generated through your referral link. You can join affiliate programs of various companies or use affiliate networks like ClickBank or ShareASale.

The revenue that fintechs make from issuing a credit builder loan can vary widely based on several factors, including the interest rates charged, the loan amounts, the repayment terms, and the overall risk profile of the borrower. Generally, fintechs may earn revenue from interest charges, fees, and other charges associated with the loan. However, specific figures would depend on the fintech company's business model and the terms of the loans they offer.