Still illegal in canada[0]:
Although the type of conduct that might constitute champerty and maintenance has evolved over time, the essential thrust of the two concepts has remained the same for at least two centuries. Maintenance is directed against those who, for an improper motive, often described as wanton or officious intermeddling, become involved with disputes (litigation) of others in which the maintainer has no interest whatsoever and where the assistance he or she renders to one or the other parties is without justification or excuse. Champerty is an egregious form of maintenance in which there is the added element that the maintainer shares in the profits of the litigation. Importantly, without maintenance there can be no champerty.
0. http://www.canlii.org/en/on/onsc/doc/2012/2012onsc5053/2012o...
Champerty is the (largely defunct) rule against funding someone else's lawsuit. I always thought that was a funny word. Champerty. But TIL that it comes from the fact that in "England, litigants could hire ‘champions’ to represent them in ‘trial by battle.’ By the late 13th century, these strongmen were being compared to prostitutes, and their prevalence hastened the movement of dispute resolution to the courtroom. During the Middle Ages, this concept of ‘champerty’ — assisting another person’s lawsuit in exchange for a share of the proceeds — emerged as part of the larger ecclesiastical taboo against usury."