Ive got only one, i cant imagine finding the resources to properly building a second one.. too expensive.
I have one and I do not intend to build more, but I ld love to get more busy, how many submissions a day are you doing?
I've just got the one. It consumes my time but it's been a great learning experience (learning a new language). Once I have learnt the necessary skills and got it looking and behaving how I want it to (new version launching in about 2 weeks time!), I might consider another since the code will be roughly the same - I'm not short of ideas just time...
I have 30+ installed but working on ~4 only. The reason for installing so many is the aim to target on keyword used in domain names. They will not be free so the only time required so far is to develop their contents myself.
I have quite a few, but for me it is about not laying all the egg's in one basket, as things out of your reach can influence in positive/negative ways on one of them. It is also for some a testing platform. Which niches work, and which don’t. Trust me there is a lot of difference, depending on the crowd/accessibility We all have different approaches and ideas on what is good, and that is splendid