Has anyone ever done a giveaway to drum up interest in their game? Maybe drive discord signups?

I did one before Christmas, where I gave away a copy of The Nonary Games on PS4, but it didn't really get many entrants - I think I only attracted half a dozen new people, which isn't really a good return on the cost of the giveaway.

Has anyone ever managed to do a successful one?

For some reason itch doesn't get nearly as many entries  as a steam giveaway would. But i do have one scheduled to happen mid April with hundreds of keys. lol probably everyone who enters will win, but i dont mind because i never expected to make serious money doing this.

I've got a little giveaway scheduled through indieDB shortly. More as a test than anything else. 

Will report back with some data and let you know what kind of effect - if any - it has on our channels.