> Anyhow how is this idea to 
> change the logo etc. of the open source softwares and 
then 
> to put them on sale ?
To make money..

An interesting related link (same person):
"We have some software and source distributed under GPL and 
would like to make a number of improvements, then retail 
it."
<http://www.rentacoder.com/RentACoder/misc/BidRequests/ShowBi>
dRequest.asp?lngBidRequestId=118509

Again, this is not a problem is the license is left as is 
(that is, you can request the modified sources), and if the 
buyers actually know that they are buying a service and NOT 
a product. But the naming change is a bit weird in this 
case .. looks pretty suspicious anyway.