Universal Garage Door Opener Lear Car2U

I am more than a bit upset to find that my brand new Chevy 2007 car universal garage and gate opener will NOT work with most leading products (Marantec Garage and Elite Gate) unless I BUY from them direct a conversion kit for each of the 3 units I own (all of which are the leading and safest models from garage and gate unit manufacturers).  I think this is predatory.  All cars I have owned since 2000 have had a universal remote built in and worked perfectly with the same equipment and were easy to program and now the new OEM system in the new GM cars is useless unless I purchase a converter at $25 a pop and install it.  Can some one give me a explanation beyond profit and greed for this ridiculous piece of "new"  equipment and associated price gouging?  I note that my gate operator and garage openers are listed on the www.lear2u.www website so it is obvious they know exactly what products their equipment needs to opperate but will not without an associated surcharge. 

The Impala SS 2008 has the same problem. Can anything be done?

Chevrolet should be the responsible party for correcting this problem - after all they selected Lear to provide this option - my dealer blew me off saying my garage door opener was not compatible with my 2008 Impala - It was compatible on my 2002 & 2005 and worked fine - I went directly to Lear & the problem was rectified for my 2008. It appears General Motors service is starting to go to pot!