Pardon my ignorance, do not understand your reply.
Back To The Top and BUMP (of latest comments). You will also see PFL/BFL (Bump/Ping for later), INDEX and BOOKMARK which FReepers use to remind themselves to read when they have the time.
For example, I saw this thread on my laptop but want to read it at leisure stretched out with my phone in bed, so the BTTT gave me the breadcrumb to find this later.