Airdrop, mining. I signed up for airdrops. But only a few of them gave me tokens, which are in small amount and are of almost no value. I have been mining Pi network. But I doubt it will ever be tradable on exchanges. So I do not find these methods as a good way to earn tokens. Rather I find bounty campaigns a good way.
I don't participate in airdrop anymore as it is fore me a waste or time and sometimes will just lead you to phishing link that can hacked your account. I rarely participate in bounty campaigns too, if there's a BTC payment campaign then that's where I am participating at, because it's a sure money and also doing trading sometimes when I have free time.