Would you be willing to pay for exotic weapons and armour on destiny ?
Ghallajorn $4.99
Hardlight $3.99
No lands beyond $0.25
Exotic armour $2.99
Custom shaders/sparrows $0.99
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There will be another Xur, called Zur, who only shows up on Monday mid afternoon during the work day for one hour to sell a small random selection of crappy exotics as microtransactions. Of course, if you buy them, you'll likely get them dropped again the next day after reset. Kidding aside, microtransactions for aesthetic items could work, but never for gear and weapons.