As you say, you're only using the "operate on Finder selection" side of FinderPop -- and all your FinderPop Items end in "---f" (meaning "only show this when there's a selection", which doesn't apply to menubar-clicks -- which is what the menulet is, to all intents and purposes, and so clicking in the menulet won't show anything.)
You seem to be looking for FinderPop to "tidy up" that contextual menu? Unfortunately the answer is "no", I'd have to patch the services code which would be a no-no when SIP is enabled. FP would also have no access to the Finder's contextual menu when SIP is enabled.
Apple should probably allow setting of icons etc for Services menu entries, then maybe it wouldn't look quite so clunky...