My rule of thumb is to optimize for “finding a topic by clicking through”. Which would be improved by reducing the number of categories.
When a proposed category already sees a fair amount of usage, it makes sense to give it’s own (sub)category. For example community calls, podcasts and payouts would be an improvement for easy click through.
Some of these could be solved with a super-topic instead. For example payouts, would be fine without it’s own category when SourceCred Contributor Payouts is pinned in the CredSperiment category.
Community calls seems better to me as a sub-category.
for tagging