Which Mastodon client doesn't respect this freedom? Tusky is GPL v3 (https://github.com/tuskyapp/Tusky/blob/develop/LICENSE.txt https://github.com/tuskyapp/Tusk

Which Mastodon client doesn't respect this freedom? Tusky is GPL v3 (https://github.com/tuskyapp/Tusky/blob/develop/LICENSE.txt https://github.com/tuskyapp/Tusky/blob/develop/LICENSE.txt). If you disagree with Tusky's choice to prevent accessing gab, you're free to fork it.