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2. Blockchain.info: Very, very fucked up wallet. Other than the many issues it has, it also has issues with sending to multiple addresses sometimes. But if you can take the risk, you are free to use it (just like campaign managers).
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Blockchain.info stopped and removed this feature to their wallet already don't know what's the main reason but it's gone. Some campaign manager ask this also because they used as always this feature on campaign's payout, I just recommend also Electrum as what other's did as they have "Pay to many" feature.