NOT a Rentry Expert here but people do this for a few of reasons:

• To prove that they are actively using the URL so it won't be re-claimed by another person.
• To prove that the genuine content on the URL has taken over 30 seconds to make ( the rules are you can re-claim a Rentry if whatever content it has hasn't taken longer than 30 seconds ).
• Some people put " I know my edit code " in that line of text because some people email Rentry Support claiming to be a person that owns a URL and that they "forgot" the edit code, just so they can steal the URL basically

To the ACTUAL Rentry experts please correct me if I'm wrong on any of this!!!! This is just what I've heard going around and I'm 99.9% sure all I've mentioned is true also sorry I'm bad at explaining things too

LMAOA it's okay don't worry about it