...as a conversation starter I like to recall (as in "calling up"...) part of the BApk statement about competition, wich relates to businesses and parkour:
"4. Parkour doesn't belong to corporations, sponsors, medias, and people sitting at home to watch.
We believe we must not accept activities and plans that are abusively called parkour, that misuse its name and hijack its image to draw public and medias attention to something that is NOT parkour, despite the resistance of the majority of the community against such intentions." [see whole statement here]
While the whole statement about competition and related threads most definitely relate to this topic (being competition one of the paramount means of business promotion in sport related fields), the more delicate -and subtle- topics of teaching, coaching and certifying have been lately involved in the promotion of profit and non-profit organizations, with different means and goals.
An aware approach to the topic is recommended to avoid being deceived by arguments instrumental to both, supporters and opposers...
I agree with every word of that statement. It is not okay to misuse the name of parkour or "sell" parkour to somebody.
I think it's okay to start a parkour business if you want to make money off of teaching beginners, like in the acrosports classes, but it's not okay to create parkour gatherings such as competitions and then sell tickets to them, as parkour itself is free to practice, and should be free to watch.
For everybody's info: these are three of the most known parkour inspired business consulting services, which are (or have been) particularly capable of leveraging the communities gravitating around them to promote their idol-status, and consequently their attractiveness to Clients: