Yes, this is part of why
@WriteNow and I have been discussing SeaBest. We reached a consensus that the decline of SeaBest is mainly by design. Starbucks is not paying attention to the quality because SeaBest was a former competitor. I might also hazard an opinion that Starbucks has positioned SeaBest as a low-cost, 'better-tasting' brand to compete with the canned coffee you find on grocery shelves (such as Folgers, Maxwell House, Don Francisco, etc). In that way it would remove SeaBest from directly competing with Starbucks main brands but provide a 'better' alternative to those lesser coffees (that every non-discriminating American drinks).
The result would be that Starbucks doesn't have to put as much money into the quality of SeaBest brands and the discriminating customer becomes likely to buy the higher priced Starbucks blends (also in the coffee aisle).
Which, I think explains exactly what is happening. But who knows. I could be wrong.
SeaBest was launching stores in my area and we actually visited one twice before the buyout. The fact that they disappeared just as quickly as they were built led me to look up what happened. And that is how I found out about the buyout.