A subject of ongoing interest here (for obvious reasons) is how developers can make money from free or practically free software. Bryan Lunduke has previously had some interesting things to say on this subject, his name has come up here before in related discussions, and he's been experimenting with various approaches for a while now.
Now he's trying a new approach to funding his software development efforts, which he lays out in this blog update: free source code (under the GPL), but only those that donate get compiled binaries. This has of course been thought of and tried before, but I suspect we'll learn more about how it all works out from following his updates from here on as he has tended to be pretty transparent about things. He's got a few other donator benefits thrown in to the mix as well, and I think he's got a reasonable chance of moderate success overall. But is that just due to his existing notoriety as a speaker and FOSS advocate, and building off the established name of his software company? Is this a model that new software devs have a chance with? It remains to be seen if even he will make it work, but I'm hopeful.
I imagine there will also be those who disagree with the idea, perhaps on the grounds that it's against the FOSS ethos, but it's interesting to note that this is coming from a pretty vocal FOSS advocate.