There's not much to say, and no spamming outsider deserves any real attention. We've been raided by other imageboards since the days of old Wizardchan, as all registration-free forums are. This time was particularly bad because of the sheer volume of spam coupled with the 3DPD content, and luckily a brave mod managed to clear things up and fend the spammer off long enough for them to lose interest, for which we should all be grateful.
In the case of spam large enough to knock threads off page 10, remember that expired threads are still visible via the [Archive] link towards the top of the thread list. You're free to remake threads that may have been prematurely killed, provided a subsequent volume of that thread topic isn't currently open.