If you'd like to hide the Powered By link, you can do it inside of your membership settings.
Once you've done that select the Membership that you'd like to edit.
Click on three dots to open secondary dropdown and select 'Edit membership'.
Select 'Settings' Tab.
Navigate down to the 'Display Powered by Branding' Section of Settings and locate the on/off switch.
Pull it to the left to turn it off. The color of the switch will change into grey.
Click 'Next' to store your changes permanently in Member App.