Unless you can squeeze money down your broadband you have to use plastic
Canada has quite an able national police force, as well as provincial and municipalities, and it certainly doesn't need the US FTC. A simple message to the RCMP liaison office in Washington, DC is all that is required.
Snake-oil originated in the US, and reading US newspapers they are as active as ever (cancer cures abound). If the FTC had completed cleaning up the mess south of the 49th then perhaps, they can cast their eyes wider.
The US often thinks Canada is it's 51st state, it isn't - that's why both countries have border controls.
The US thinks it is the worlds policeman, it isn't, yet you find the US Coast Guard challenging ships in the East China Sea and other places thousands of miles removed from the continental USA. It pays little heed to the niceties of other countries rights; there are US DEA officials in many countries.
If the offending company did wrong, Canada is more than capable of handling it - without having to deport the operators to the US for their version of 'justice'.
Credit card errors can be resolved through the card issuer and the card issuer is well able to withdraw credit card handling facilities to businesses, of any kind, so they will lose the convenience.
Besides, if Americans are dumb enough to supply credit card details in order to receive a purported 'free' offer, and they are incapable of thinking something is fishy, then they are fools.