"Where all the "cool ones" were" ? Wrong.
"Why all projects moved to GitHub? Just because it was perceived as where all the "cool ones" were."
Wrong.
Source Forge, GitHub's predecessor as the place to put your open source project started rolling ad-and-worse-ware into the pre-compiled binaries offered for download.
Unsurprisingly, the vast majority of users found this so offensive that they were willing to put what was probably hundreds of thousands of man hours into shifting over to GitHub.
Had you really forgotten that? Or is it just that you never knew?