That's not only for the sick and elderly, but for all lonely people. I have actually thought about such a service a while ago, because I read about those online leeches who pretend to be poor girls from a developing country (actually they are mostly middle aged men). They keep in contact for years, urging their "host" to send them money to support them, and sometimes even help the host find a job when he is fired. The hosts readily send even huge sums just so they can connect to somebody emotionally. This clearly shows there is a lack of warmth and connection for people in our society, and I can think of better ways to help them than through online leeches.
Sadly my father has been a victim of this sort of thing. He has been transfixed by the idea that a Bank in Ghana has an $8 million dollar inheritance for him. I have had so many conversations with him about this being a scam but he won't believe me.