If I didnt get you wrong you have 3 independent applications which can be linked together to an ecosystem and now you want to know, if you should start an ICO for every single application or the ecosystem itself, right?
If so, I would start the ICO for the whole ecosystem. Running ICOs takes a lot of time and effort, additionally, the more features your ICO-product can provide the better and you will attract more potential customers.
That's right. So why should ICO ecosystem? Sorry about my bad english.