http:// www.twitario.com/en/
Argentina offers millions to find lost sub
http:// www.news.com.au/world/breaking-news/argentina-offers-millions-to-find-lost-sub/news-story/729db58b4f0f3e34d5e2e60c84b96449e
The only reason to offer a reward is it they know the sub is still afloat and roaming around somewhere. If they believed an accident happened and it had sunk they'd spend money on searching the bottom of the ocean for it.