For those saying that this is a cartel, you don't understand what a cartel is.
A cartel is a formal agreement among competing firms. It's a formal organization where there is a small number of sellers and usually involve homogeneous products. Cartel members may agree on such matters as price fixing, total industry output, market shares, allocation of customers, allocation of territories, bid rigging, establishment of common sales agencies, and the division of profits or combination of these. The aim of such collusion (also called the cartel agreement) is to increase individual members' profits by reducing competition. (Wikipedia)
The Harbinger Crafters do not control industry output or market share. Anyone can learn how to craft level 27 mods in this game, it's not like they were lucky enough to be born with oil on their land (which is what the oil cartel consists). If you put in the time and work, you can craft these too.
For those that disagree with the price, don't pay for it. Simple. I use them because 1) I trust the brand, 2) it's convenient, I get the item I need right away, and 3) I always tip at least 50k anyway so the fee is right in line with what I expect to tip anyway.
There is really no controversy here, other than free good publicity.