Not all users knows actually to install actual hacks so they commonly prefer flashcards over searching a even realible solution. In the current scene state, flashcards are very obsolete, because we have open-source tools that does exactly what paid tools had before. One can say that gateway clones code from actual tools, that fruits from RE work. For who don't knows it, Gateway released year 2013. They probably started cloning code when better tools went open-source.
They make bad choices either - bricking 3DSes of it's users in order to prevent clone cards, making their A9LH implementation impossible to fix if something goes wrong, or even more. This piss off users, so they won't reccomend gateway products to friends or people that need help at beginning due to this.