come to links index

come to links index
is it harmful or is ok?
let's say you already index some links than you also insert the same links to be index using other service
++++++++++++++
list of top cheapest host http://Listfreetop.pw

Top 200 best traffic exchange sites http://Listfreetop.pw

free link exchange sites list http://Listfreetop.pw
list of top ptc sites
list of top ptp sites
Listfreetop.pw
Listfreetop.pw
+++++++++++++++
Nah, it's not harmful.
Thanks for Clarify , because I always wonder the link already submit to index , than i use another plaform to index the same link , google will pernalisze it ?
so is ok , but will it benefit ? for what I did or is the same , ? I don't want to waste time do a thing end up nothing happen so I ask this question.

6 domains of self care
hosting email
to make money in french
advanced host monitor forum
m4t.net
hosting quickbooks online
make money hosting game servers
getyourgroats.com