Multinational corporations often have different accounts for different regions. Corporations that operate in multiple sectors often have different accounts for different sectors.

Some are both multinational and cover several sectors, for example Yamaha.

Here are just a few Yamaha twitter accounts: @YamahaMusicEU, @YamahaMusicUSA, @YamahaUK, @YamahaAV, @YamahaMotorEU, @YamahaMotorUSA, @YamahaMotoGP.

When a company makes a product they may or may not wish to make the same announcement on the accounts for that vertical across different regions. Most often the really big ones will probably make different announcements due to both differences in desired wording and in launch dates, but still the point stands that they might sometimes wish to post the same news.