I don't know how people participated in bounties in the past but with the way it is discussed, I don't think it's as difficult as these TG bots and airdrops. I'm not saying airdrops are difficult to participate either but these TG bots are full of various projects that end up being scams or dust projects and it would have already consumed a lot of time and energy from the users or participants. Since this isn't an airdrops topic,so  I won't say much regarding airdrops or even mention examples but I suppose these airdrops projects are not as reliable and profitable as bounties are because I'm pretty an active user of airdrops too.