I think they just pull them as they are apparently plugs. So they they 'pull' (or backtroll) them downstream in their boats. That's what I'd guess, but I really have no clue either since I'm not a boater.

But, seriously does anybody know how much my supply would be worth? A few glossy textured ones and a few rough textured ones (some of those glow in the dark). 13 of them that I've found so far. Anyboy know? Thanks.