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I’ve heard about Dubai doing so, but it seems like the people who are against geoengineering because of the risks would be more willing to give cloud seeding some funding, not only locally but internationally. This, combined with the voters and government officials who support geoengineering research should mean that cloud seeding should have a pretty big budget at this point in the global warming crisis.

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The politicians just didn't find a way to profit massively like they are profiting from other "green" energy sources. As soon as they do and there's public interest (so they can leverage as being the "good guys") it will be implemented.

In short: lack of incentives.