Just looking for opinions.

I've started my store a while ago and got a whopping 200+ followers on Facebook after a wee bit of advertising but I was thinking about doing a giveaway to hopefully gain some extra publicity and maybe a few Xmas sales.

Does anyone have any opinions on this idea - I see many handmade crafters doing this but unsure if it's worthwhile - I also have twitter and instagram for my store so was thinking about crossing the giveaway across these 3 platforms.

Thanks