First nations peoples I guess have to make a choice on whether they want their cultures to be relevant and mushed up, or pristine but less relevant. Reality is mainstream culture has long taken bits of trendy and interesting subculture and elevated it to greater popular circulation and exposure, but during this "appropriation" process it will become diluted and used in vulgar, low brow mediums like cheesy pop songs, mass market movies, crude childrens' comics/cartoons, sports team iconography, etc. This is not limited to racial culture but also all kinds of subcultures, art, cuisine, music, cuisine, and other niche. When a culture gets recognized and elevated in the public sphere its purity and authenticity will take a beating, but it will have exposure and more people who are inclined will learn more about the authentic side of it, people who wouldn't of it they hadn't had basic exposure. It's hard to imagine there being much long term appeal in this (undemocratic) idea that certain racial cultures are to be widely beheld and admired in the broad public sphere, but never touched by inspired artists, cooks, sportsmen, craftsmen, musicians, etc. unless they hold the proper (poorly defined) purity licensing.
At the way things are trending, the puritans seem to be winning and are successfully purging First Nations references from some of the most prominent popular venues around. Is the future then that their culture will be displayed only on poorly rated public broadcasting channels, sections of museums, and sparsely attended ceremony events? It could be geniunely considered a victory for this faction, others with an opposing viewpoint might disagree, and it could even lead to long term disinterest amongst people with that heritage. From polls I've read it seems most First nations' people are pretty split on the issue, but the puritans tend to be louder as they gain a sort of prestige currency from denounciations, which carries weight in certain lucrative academic, political and media circles. So these highly motivated activist climbers seem to carry the day over more easy going types.