I ended up tweeting EasyJet and they sent me the BP over email. The whole thing is just really silly and was the last straw for me. Not only is SFX a pain to get to early--meaning a cab that will entirely take up the difference in fare between EasyJet and a real airline out of TXL--but all the crazy rules other airlines don't have, needing to pay for a seat assignment, checking bag, etc. It's neither more convenient nor cheaper. I'm just failing to see the point. Shame on me for not having done these calculations earlier. Never again, and I'd say that even if I hadn't had this ridiculous issue with EasyJet's OLCI system.