Pubs are closing at a rapid rate and those that dont are going over to food and not having dart boards so how can the BDO survive long term?
The BDO will probably survive as they are the governing body for darts in this country.
The PDC is a completely different type of organisation, concerned with running top professional darts in much the same way as snooker is governed.
The number of pubs offering darts is, as you say, shrinking, but there will still be plenty around for the game and the BDO to thrive in the amateur game, and to have a small number of large professional tournaments.