As quoted from the rules on the submission page:
NOTE: Once you have submitted your tiny dick picture, the submitted picture becomes the property of ratemytinypenis.com to do with as we see fit. your picture may be used in promotional material for this website and will be posted across the internet via all of our social media outlets. Any requests to remove your picture from Our website will need to be accompanied with a $50 removal fee.
To pay your removal fee, you can send via many payment processors, all available on Mistress Kiara’s Website. When you send payment, be sure to leave any ‘for’ field in the app blank, and send a separate email to email@example.com with the link to the post with the picture you want removed as well as the payment processor you used to pay the removal fee. your picture will be removed typically within 24 hours of the time the email is received, only during Mistress Kiara’s available hours, but allow 5 full business days before following up. Any cancelled payments will result in your picture being reposted. Mistress Kiara is available between 5pm – 3am EST every day except Wednesday.