Because people are watching there has some hope as well a "Giveaway".
That's why everyone follows him even we all know "Dlive" is not quite popular, we can see the comparition between Microsoft Game Live with Twitch. Even they can bring shroud, they still can't passed twitch.
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Back to the topic, twitch are really fight against gambling activity on their platform. The different of this case, there has some case on their streamer (That's why they take more action) rather than the previous one.
Some people may have been following or watching his stream because of possible giveaway however I doubt that everyone of them are only there for giveaway purposes. Strategies and other possible reason could also be considered as I don't think these people will waste their time watching and even following them on other platform just for a chance on the giveaway.
That's the thing, DLive isn't that popular yet they managed to retain some or most of their viewers. Anyways, even if they bought the streaming platform, we all know that they can't overtake twitch in terms of popularity.