They might make it harder to select the third option, but they won't ever remove it -- they're not suicidal.
And it's not like the signing process is particularly onerous -- it won't represent even the slightest barrier or inconvenience to shareware, freeware or open source app distribution.
And it's not like the signing process is particularly onerous -- it won't represent even the slightest barrier or inconvenience to shareware, freeware or open source app distribution.