the reason why i'm always present on most ICO is that first i provide translation and ask bounties whether twitter and article submission. its free coins, every one loves free coins.
free coins? Nothing is free! You are providing a value by spreading the word about something, you are promoting it in your signature. Translating something into another language takes time and knowledge of at least languages and it helps spread the world to potentiality hundreds, even thousands and more people from that country or places where that language is spoken! Most importantly you are taking your time and time is money, you could have done something else , even earn money, in that time.
No one is giving a free money and bounties are not free gift. If it would not bring benefits to any project no one would offer them - why would they give you free money? No one is that stupid or generous. I am NOT talking about incent but in general.
Then there is more: some coin might not get listed on any exchanges, you might not be able to exchange them for real "money" or the value might fall so low that the hours you spend on translation might be worth next to nothing by the time you exchange it for btc or something else. Heck, there are even cases, like Darcrus for example, where you might be doing all promo or translations for free (read: at your own loss) because if it doesn't get 1000btc then the project doesn't go ahead.
You never know if your translation or you signature or your twitter RT might have brought a bigger investor. I really don't like people seeing translators,social media campaigners or signature holders as a bounty hunters and wanting to get something for free, many times being portrayed in a negative light. For bounty activities bring value to the coin and project, that is the sole reason why they introduced them. Everyone helps the way they can. In the end, people who buy coin are only in it due to profit too.