This is a highly opinion-seeking question, but I'll answer anyway.
I run an NTP pool server. It's one of a large number in the UK and European pools, but it's pretty heavily used - this is the number of unique clients making requests every second over the past year:
Even in the highly-industrialised countries, there is always a need for more pool servers; outside that region there's even more of a need, if traffic on the pool mailing list is anything to go by. If you have a stratum-0 clock, and don't mind strapping it to a unix box and making a public stratum-1 server, it'll be a service to the internet as a whole.
Moreover, as others have pointed out, being a predictable round-trip from an NTP server improves one's own synchronisation. Round-trip latencies tend to get less predictable when congested links become involved, and long-distance links are often the most congested, so your server will be particularly useful for people in South America; Argentinians most of all.
Running it through the NTP pool system minimises the workload involved, since the pool monitoring system will pull you from the pool if you lose sync or start to advertise a crazy time.