Well, if you mine every single namecoin block, that's a total of about $900 a day.
The pool is 700PH, the miners (according to further up) are about 15PH, so that's about an extra ... $19 a day for those 15PH of miners.
15PH currently makes roughly $2.3k a day
So as long as this pool find EVERY SINGLE namecoin block, that's a bonus of 0.8%
Now of course the pool doesn't find every single block - if they only find 10% of the blocks, that's a bonus 0.08%
If they find 1% of the namecoin blocks, that's a bonus 0.008%
Yep it's a complete waste of time.
Edit: and by the way, since your title says "The Most Profitable Mining Pool" yet your current reward depends on a temporary drop in fees, then I guess it would also be valid to say that my pool's history of paying an average 110.11% of 100%PPS for the last 30 weeks proves it's a lie

Woah, hey now... if you bring logic into it you'll ruin all the.. "fun!"