2 ways to market your channel: giveaways & gifted memberships. But is that healthy in the long run?

We're seeing lots and lots of channels doing giveaways. Hey, I'm guilty too! But are these the best way to grow a channel? Are they sustainable? Could they result in long term backlash against you for endlessly shilling for ... yourself? I want to hear from the audience on this one so leave a comment.
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