Staying away from the political side of things, it's impressive how many people are willing to spread obvious disinfo if it serves their agenda. I'm sure many of these alt-righters realize that those documents are most likely fakes but it doesn't matter, whatever hurts the opposing party.
Look at the Cayman document leak from yesterday, one of the laziest montages I've seen lately. Didn't stop it from being plastered everywhere on "alt-right" websites with big VERIFIED tags.
It's just the strategy of drowning actual information in a sea of lies so that nobody bothers to look for it. The worst thing is that an actual leak about Macron's tax evasion could be released now and I probably wouldn't believe it. It's just all noise.
It's about all they have left :)
There's a law in France saying that media can't discuss campaign anymore two days from election, the idea being that debate time is over and it's now time for each citizen to take a step back from the heat of the campaign and calmly decide what they think is the best for the country (this is obviously something that doesn't work as well now we have internet). So far right activists only have foreign discussion threads as a mean to spread.