Ive had no problem getting listed at the 20 places i have on my 20 cell recip table
In fact most linklists very much enjoy it over the standard 8 because of PR and Traffic to the page will be higher.
I personally did it for those reasons, as well as cutting down on duplicate pages that google hates by having to make 4,5,6+ copies of the warning page, now i make 1, sometimes 2 if I have the time to submit to 40 places