Actually I don't think they did. Rockstar stated there would be better support for modification/customisation. There is some speculation that the fat/thin Carl, clothing choice, car tuning options, weapon usage stats and Respect meter that are standard in SA are what they were referring to as the original exe had some major barriers to many forms of modification (MTA's methods included), let alone a further patched version. Other interpretations were leapt to by the community.