The age of your account has no bearing on ShadowBot or Cheetahbot's blacklisting.

If you get a post that is friendly and an up vote from CheetahBot you are just being notified that your content appears very similar to other content on the internet. It does NOT add you to the blacklist.

If you get a post from Cheetahbot that starts with "Warning" and tells you that you are on the black list, you are now on their black list and will be added to ShadowBot's black list as well.

All members added to our Black List have the 7 days from that time to explain their case and if we decide you are not abusing anything or spamming we will remove you from our internal Black List.

Currently I do not see a readily available way to access CheetahBot's blacklist but we are building the list from the blockchain based on their comments. ShadowBot will provide a way to access and search the blacklist!

Please read through the FAQ on CheetahBot to understand more:
https://steemit.com/steemit/@cheetah/faq-about-cheetah

(We are in no way shape or form affiliated with @cheetah or it's developers, we simply like their style and have built a great resource for us to build on top of!)