They have had some success in buying low on flawed / overly aggressive hitters before.
Clement mainly but they fixed Straw. Valenzuela kind of an example. They tried it with Gimenez as well, without success.
The issue with Sosa is that the rest of his profile is horrendous. No defensive value or speed, limited defensive utility even. Every other hacker acquisition came with secondary skills. Sosa has zero. There was never much upside on his range of outcomes.