depending on the scale of what you want to do, you might not need to have a lot of capital to get some online service up and running. however, you might find it difficult to have access to the same advertisement resources, you can be cloned right away, you can be blackmail-bought, you may find limitations put in place by hardware makers or by the ecosystem owners and you might have to share your revenues with those guys. so, although you can start with nothing, others start with a lot more - and capital reproduction and primitive accumulation keeps happening, whether you like it or not.