if I personally prefer bounty campaign than airdrop, because I need a lot of information on the forum by making posts I can get the latest information about crypto. Airdrop can not be said to be completely free because some of the airdrops require fees, so it all comes back to each person's decision.
I spend more time every day on the exchange to trade so trading is my main choice in the crypto world.
If you are selected for the signature campaign, you will have more motivation to be active and discuss with other members. I often like to follow the news and evaluate together the impact of political and macroeconomic news on the economy and the crypto market. AltcoinsTalks has many talented members, I always learn a lot from reading their comments, especially about conspiracy theories ^^
I have also participated in many bounty campaigns with many parts such as Social & Content but currently I have spent too much time on my official job at the University so I cannot continue to pursue new and unaccepted projects in the market. I am satisfied with my knowledge of topcoins and only invest in them.
Trading is always an interesting segment of the market and traders play an important role in maintaining the liquidity of CEXs. I want to become a professional trader and work full-time but for now I don't have enough capacity to live on trading.