Just so its clear, with this idea you would have to build you own achievement system regardless. You're just giving the site a copy of it.
Just curious, what would the incentive be for me as a site owner to pay for your service as opposed to building my own?
It really depends on the complexity of the 'rules' which award the badges and how often you update the requirements or add new badges. If your badges are going be like "post a photo!" then you really don't need one. But, if you have a very high traffic site and a badge that is awarded if X happens 100 times & Y happens 200 times OR Z happens 3000 times... then you have to consider how you will manage these requirements. And also how much extra load you're adding to your database every time a user performs one of those actions.
Comments
Just so its clear, with this idea you would have to build you own achievement system regardless. You're just giving the site a copy of it.
Just curious, what would the incentive be for me as a site owner to pay for your service as opposed to building my own?
It really depends on the complexity of the 'rules' which award the badges and how often you update the requirements or add new badges. If your badges are going be like "post a photo!" then you really don't need one. But, if you have a very high traffic site and a badge that is awarded if X happens 100 times & Y happens 200 times OR Z happens 3000 times... then you have to consider how you will manage these requirements. And also how much extra load you're adding to your database every time a user performs one of those actions.