Turn off the branding
Go to Page design and open the design your pages use.
Under Additional options, switch on Remove Calendarlink branding.
Select Save under the additional options.
The change applies to every event and collection page that uses this design. Repeat it for each design you use. See Customize your event pages.
On the free plan you can try the switch in the page preview, but it is not saved.
What stays
"Organized by" with your organization name stays on the page.
The logo at the top of the page is the design's logo. Upload your own with Upload logo.
Buttons and widgets you add to your website have their own Powered by switch. See Add buttons and widgets to your website.