After signing an exclusive copyright contract with the webcomic platform, the copyright still belonged to the author. According to the law, copyright refers to the rights that the author has to his work, including copying, distribution, rental, exhibition, performance, screening, broadcasting, information network transmission, etc. When an author signs an exclusive license contract with a webcomic platform, the platform obtains the right to publish and spread the work on the platform. However, the author still has the copyright of the work, including the original expression of the work's name, author, plot, characters, etc. Therefore, even if the platform uploaded the work to the Internet, the author still had the right to modify the work, license others to use it, and obtain economic benefits. It should be noted that the exclusive license contract may involve some intellectual property terms, such as the scope of authorization, usage methods, profit distribution, etc. If you are not satisfied with these terms, you can seek legal advice.