I think the Zoho community team needs to seriously re-think the policy that is routing app-specific topics to the Zoho One forum.
I understand that the support team is likely segregated and scored based on their own groups of customers; I can see how it could distort internal metrics if Zoho Books support is dealing with a Zoho One customer if Zoho is tracking such things.
However, from a user and community perspective, this makes no sense at all.
The point of a user community is to learn from each other, and having half of the threads about Zoho Commerce (for example) ending up in the Zoho One forum splits up that information and hides part of it where most users wouldn't expect. If someone is having a problem with Zoho Books and searches the Books forum, they're not going to see answers posted in the One forum.
It also doesn't make sense because it would start to segregate power users. A disproportionate amount of the most knowledgeable users are One customers. Separating their posts into the One forum will likely cause them to spend less and less time in the individual app forums, degrading the quality of the posts and replies.
I feel pretty strongly that having app-specific posts remaining in the app-specific forums is important to the integrity of the community. Allow the One forum to be about One-specific issues. If you all need to sort out how support is handled / recharged internally, that should be done in a way that doesn't disrupt the logical flow for customers.