The FTL statement comes from Athena's shield
I am aware of the context, however, none of those statements make the bronzes FTL, my point wasn't that the bronzes cannot reach light-speed, it was their stated speeds aren't billions of times FTL. The only explicit mention of FTL movement is from Ody and Tenma, where Ody says that he's FTL hence why Golds couldn't hit him with their light speed fist.
Before anyone says this panel goes against me, Sukiyo's cosmo was surrounding Tenma
So it was an aided feat, a feat consistent with how FTL speed is portrayed in the spin-offs as well, but that's not too relevant.
More to the point, if Ody says the Golds are light-speed (whom he fought just about all of), that would include Cain who's above the 18th and 20th century Golds.
So Golds being FTL is massively inconsistent, with the lowest peg on the scaling chain that can reach FTL speeds being Ody and Sukiyo amped Tenma, if not Athena's shield.