Forgive me if this has been answered already. I have some BTC addresses linked to byteball by signing for the last distribution. Do I need to reverify by signing the same addresses for the next and subsequent rounds of giveaway?
What you do need to do is go to blockchain.info and check that your BTC addresses still hold BTC. Your address may change if you make a payment, so you will have to follow the link to the new address and relink it with the bot.