Here-- I'll give you some hypothetical plot outlines
1)
Humans invent upload tech, but it is considered too ethically encumbered to allow widespread adoption. Event happens, organic humans die, only a handful of upload personalities survive due to hobbyist interest in the tech. Due to statistical laws of distribution, these uploaded personalities will be pretty randomly distributed across technologically advanced countries of origin. There are not sufficient minds per region to sustain the infrastructure, existential crisis trumps "Zany life inside computer" type plot.
2)
Humans invent upload tech, and it is widely adopted, but due to ethical concerns, the use of the uploads is restricted by law. Because the data is considered confidential, with agreements that the upload imprints are never going to be activated, people feel more comfortable with the tech. This could be useful for highly futuristic versions of things like FaceBook-- Instead of uploading pictures and sound files, you can upload whole imaginatory sessions, dreams, emotional states, etc-- for others to experience by selectively downloading parts of the upload stored by the service. People who are very much religiously minded may come to begrudginly accept this new tech, as things like the job market start demanding it (much like social media is becoming that way now.) After the event, the only few uploads that are "Active" are those by enthusiasts, who lack the collective experience to manage the global infrastructure that they now desperately need to survive. So, they activate the stored uploads that were previously held confidential, against the wishes of the now dead humans, when these uploads were first created. As a consequence, some of the uploads will experience existential horror. BOOM-- Terrorist uploads.
The direction you are trying for requires that the few willing uploads be able to manage a global infrastructure all by themselves, with sufficient alacrity that they do not have any issues whatsoever, and can have the "Whee! Zany life in a computer!" plot happen. Because "Robots".