No, the problem is that there is no legal way for them to actually use the money once they have it.
Let me break down what's going on for you:
-They've made using or interacting with any of the donations a crime in Canada.
-So, they've introduced massive fines ($100k) to the protestors for protesting.
-Lets say they managed to sneak all the money from the donations into Canada without being noticed and have stashed it somewhere the government will never find
-Protestor pays the $100k fee using the money that was smuggled in.
-The forensic accountants and tax agents in Canada pounce on their tax return and financial details.
-"Hmm, from your tax records, we can see that you've spent $185k in total this year, but your annual income is only $85k and your savings (which are still intact) are $50k, you have been able to spend $100k more than your legal income makes possible. This is tax fraud." (this is a simplified explanation)
-Then, the government can either prove that the money came from GiveSendGo, or that the person has committed tax fraud. (same way that governments prosecute drug dealers. If you can't prove the money was made from dealing drugs, all you have to prove is that they have undeclared income and rape them for tax evasion Capone-Style).
So, unless the protestors devise a way to legally launder the donations such that they will appear as legitimate taxed income unrelated to the donations entirely (and can stand up to the ultra scrutiny it will face by teams of forensic accountants and tax agents), then the donations are completely "Water water everywhere, but not a drop to drink".
That's why the massive punative fines are being used. It's possible to secretly mix the donation money on the scale of $100-1000s into your legal income, but when we're talking about $100ks, unless these truckers are Millionaires or Billionaires, there's no covert way to float that huge an expense and get away with it.
That's why in Goodfellas, they're telling them not to go buying cars and houses and other big expenses after the big heist.