Thanks a lot for your comment. I will try to answer your question.
When you hold the CTPSB token, you become part owner of the underlying @ctpsb account and it's Hive Power (tokenized asset). This means that you participate in all the revenues of the account. This account has several income sources. It earns curation rewards from the own Hive Power, from the delegations. Thanks to regular posts, it also earns author rewards and some people also set the account as beneficiary. The result is that since all the income is increasing the value of the account, it will also increase the value of each token. It's like a shareholder company that makes income and as a result all the share holders profit from a higher share value.
Since there are more income sources than for standard curation, it can be expected that the token progresses with quite a high APR.
I hope that was understandable. Don't hesitate to ask if you have questions.
Thank you for your informative explanation, it gave me a big picture. For advanced accounts and authors, this is a very good idea. Have a great day!