Scoot Boot and Monogo trailers 

I reverted the mention of these trailers, and the claim that they were gaining in popularity.  The sentence "Most notably, scooter trailers, which can be attached to a scooter an pulled behind to increase the cargo capability of a scooter," cries out for verification.  I found no secondary sources which support the claim that scooter trailers have gained notoriety or have increased in popularity.  All we have is self-serving sources which say that these products exist.  See Wikipedia:Existence ≠ Notability.