Why no blogger blog in ping list index ?

Hi good morning to all,

Just look in my favourite pingomatic if there is for exemple some blogger blog
results 0000000000000000 ????

All pages webs or wordpress results i try to all of those ones. So better making pages and get away blogger ?

technorati.com
icerocket.com
weblogs.com

newsgator.com
blo.gs
feedburner.com

blogstreet.com
my.yahoo.com
moreover.com

newsisfree.com
syndic8.com
feedster.com

weblogs.se
topicexchange.com
blogdigger.com

blogmatcher.com
pubsub.com
coreblog.org

blogpeople.net
bulkfeeds.net
blogrolling.com

catapings.com
effbot.org
focuslook.com

holycowdude.com
octora.com

thanks enjoy

:cow_yello