Financing parties is complicated by design as the French system tries to avoid interference from companies or wealthy individuals. RN was struggling because they are greedy incompetent pigs. So they decided collectively to use the money dedicated by the European parliament to recruit parliamentary assistants to finance the party's activities. And they got caught.

This won't affect their chances as racist voters will still vote for racist candidates, whatever the candidate. We will just have a new racist guy (Jordan Bardella) instead of Le Pen.