Well this may depend on what rank they are if there are higer ranking they might see this as a job but for somw other it can be a part time job or like me i do these job to add some finds for my hobbies join and hunt those bounty
indeed the best way is to take part in a bounty campaign, there are many advantages we can get if we join the campaign and building where we can join the prize campaign, of course with the level of bitcointalk users, if our rank is higher then the bigger the coin income we will receive.