a bit off topic, i have to say in all honesty that ive never really considered BDSM as a r/ship, BDSM to me is simply a cover all term for a particular sexual preference either with or without actual penetration.

if for eg you regularly practice bondage for pleasure would you consider yourself in a 'bondage r/ship'?

the r/ship in and of itself is simply D/s alone...many people enjoy BDSM but have a 'vanilla' r/ship and many have a D/s r/ship but have no interest in BDSM.