There are a million things relating to an attack which the IRCd has no bearing on whatsoever.

Since I've never admin'ed CR or any non-free IRCd I can't say for certain - but I sincerely doubt that even with the factors the IRCd does control the attack resistance is significantly better than some free IRCds. Certainly not $1000's worth to a non-profit community anyway.

Spelling mistakes, grammatical errors, and stupid comments are intentional.