I think the 4 install limit just refers to the desktop installs. Access from mobile and desktop/laptop web does not come under that limit. I'm guessing here, but I would imagine that any mobile versions that come along in the future will come with their own install policy to provide additional installations. If one is
seriously using more than 4 laptops or desktops as a single user and really needs the brain installer on 5 or more machines then that probably warrants a second licence or perhaps a licence extension of some sort. But i guess the whole point of Webbrain was to provide that kind of wider access if you really have over 4 machines in 4 separate locations that all happen to be desktops that only a single user has access to.
The obvious issue is that vendors have to also protect their income for software above a certain price point for professional tools and this is common practice not only in the software industry but elsewhere. Providing unlimited installs without control leaves the product overwhelmingly open to abuse.
TB8022 32bit Java 32bit Version 8 Update 141 Testing 9.0.224 Windows Firefox, Office 2013 Pro Plus 32bit 64bit Win10Pro 64bit Primary Laptop, 8GB RAM, Intel Core i7 64bit Secondary Laptop, 64GB RAM, Intel Xeon E3 Brain user since zygote