Crowdfunding has grown massively in recent years and it is good to see it spreading to other areas. Why not be allowed to use it in the case of legal challenges as well. It means taking legal action becomes possible to people, or groups of people who previously wouldn't have been able to afford it.
By pooling funds to support controversial causes, the public can raise awareness and help lawmakers understand what is vitally important to them. With all the noise and feuding among our electorate, we may have to start such movements in the US to make ourselves heard over the Trump Tweet-for-all campaigns.
Yes, crowdfunding makes legal challenges more accessible to grassroots organizations. Evidence of this can be seen in the United Kingdom, where a civil liberties group was able to use crowdfunding for judicial reviews. Without this form of fundraising, many issues would fall to the wayside in favor of more glamorous causes.
Crowd funding makes legal challenges more accessible to grassroots organizations merely by providing and easy to get funding source for its activities, Including judicial review. That's not to say this is a good idea or not. But, fundamentally crowd funding is a very simple way to make some easy money.