Why would a two-step but clear allusion not be ramz merely for having few links?

Taʿrīḍ, Talwīḥ, Ramz, Īmāʾ and Ishārah; the Rhetorical Force of Figurative Speech

• Ramz requires obscurity in addition to few links
• Ramz requires at least five links
• Ramz occurs only in poetry
• Few links automatically make kināyah figurative