Will it be a footprint ?

Last month I have create some web 2.0 sites having the same name as my money site( ex- for dog1010.com dog1010.wordpress.com)
Now will I face any problem if I link those web 2.0 to my money site ?

If 20%+ of your web 2.0 have the same name, then yes, it is a footprint that might cause problems.
Having few of those is not a problem as it could be just a coincidence for the "public/big G eyes", but anything more than that is dangerous.