Complex sentence: The awards continued after the "Guide" itself ceased publication, and were renamed the Gay Erotic Video Awards in 1998, the last year for which awards were given, at ceremonies held in 1999.
Split into simpler sentences: The awards continued after the "Guide" itself ceased publication, and were renamed the Gay Erotic Video Awards in 1998. Ironically, 1998 was the last year for which awards were given, at ceremonies held in 1999.