There are several reasons for the same. Here’s sharing some handful reasons –
1. When you are on a paid subscription in teacher’s listing web portal to showcase/sell your service, you are definitely strengthening the authority of the portal. Its mutually benefitted; you are contributing to strengthen their brand and also getting quick exposure to potential students. No matter how many years you are paying them for the service to showcase your portfolio, courses and credentials, the month you stop paying your subscription, you seize to exist in the digital world, neither Google nor any potential student can find you.With self-owned website, your course/s are always available in the digital world. Even if you take a short break, your services are accessible by search engines, you never disappear. The longer your services are available in the web, the more trust you earn by search engines. Please note – website hosting rentals are economical too.
2. When you rely on the third-party portals to sell your services, you are dependent on them. They may increase their subscription rates; they may change the listing algorithm. They may even shut down someday. The situation is synonyms to living in a rented house/apartment. Rented place is good for short term right.