Recent moves by Twitter Inc. have members of its developer community worried they could be made obsolete, but a pair of new deals indicates that investors still aren’t shying away from Twitter-based business bets.

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The new investments, in photo-sharing service TweetPhoto Inc. and Twitter marketplace TweetUp Inc., follow Twitter̵Recent moves by Twitter Inc. have members of its developer community worried they could be made obsolete, but a pair of new deals indicates that investors still aren’t shying away from Twitter-based business bets.

AFP/Getty Images

The new investments, in photo-sharing service TweetPhoto Inc. and Twitter marketplace TweetUp Inc., follow Twitter’s acquisition… More»