clockwork_189

I am trying to find an incentive provider that I can integrate with my web application. I want it to work such that every time an action(that I define) is taken, they would get rewarded a certain number of points. I want to give people the ability to convert points to tangible rewards. So far the only two I have found are Tango Card(https://www.tangocard.com/) and I Feel Goods(http://www.ifeelgoods.com/). I was wondering if there are more popular ones used?

I will be in SF next week for my startups YC interview and I was wondering if there are any cool startup/startup incubators that I could visit while on my trip? Having a startup in Canada, I am actually very curious to see how startups in SF work and function.

I recently stumbled across the tech stack of Quora(http://www.bigfastblog.com/quoras-technology-examined) and Summify(http://www.bigfastblog.com/summifys-technology-examined) through hacker news and I found their insights on what technology they used and why, very helpful for my own SaaS project. I was wondering if there are more similar articles on other technology stacks. It would be very helpful for future developers to learn from the mistakes and choices of these big platforms.

I have been looking around for tutorials or advice on securing our web app, but unfortunately there doesnt seem to be any good resources that I could find. Is there any good book on security for startups or rather just security for web applications?