If your canadian vendor claims to be able to succesfully get packs through the border but somehow is still on vacation, its a load of bullshit. Canadian packs are getting routinely seized now, with short 1-2 weeks breaks just to lure large vendors to start shipping again before they seize another wave.
Even sophisticated stealth well beyond the mylar/vacuum range are getting seized. Even packs shipped from Alberta or paid with a business credit card are being seized as well. I suspect Trump's presidency has prompted Canada to upgrade drastically their scanning infrastructures for all packs going to the US. The only things making it through the border right now are sleds.
The investigation that started around January last year must be complete soon.
I just bought a ton of popcorn.
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