Two services I was aware of that are no longer around.
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There was a system through the VA that allowed deaf veterans to do text-to-voice. A person would receive a call which began with an automated message that alerted the recipient that a veteran was using the service. However the message sounded so much like a spam call that people would just hang up and block further calls.
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The second service was where you could IM a person who would read the message for you, then IM back with the responses. Of course people are dickheads and would spam these services with prank calls and give these poor operators horrible things to say, and the service died.
