I was mainly thinking about the specific task of validating through ads and landing pages. Tracking interest/conersions that way. In order to do that you want t

I was mainly thinking about the specific task of validating through ads and landing pages. Tracking interest/conersions that way. In order to do that you want to be able to test lots of ideas without re-writing lots of code. I know there are lots of solutions out there like: instapage, unbounce, etc. I tried instapage but I had a huge amount of trouble getting it pointed at a custom domain. I eventually gave up and decided it would be easier for me to just develop a re-usable landing page framework in rails and deploy it to different custom domains using heroku.