The "fedi chick" spams continue because spammers are signing up on Mastodon instances with instant signups available. If you're running a Mastodon instance, please switch signups to approval mode instead.
You can do this at Preferences > Administration > Server Settings > Registrations > Who can sign up, set it to "Approval required for signup" and "require a reason to join", then save changes.
If people keep getting spams from your instance, it may end up defederated.