I looked it up, (thats where i found that article) and i saw another jewish forum discussing this and quoting midrash and doing all that stuff we girls dont understand.
anyway they came to the conclusion that according the the midrash and a bunch of famous rabbi’s i dint kniw by name you cant give ur olam habah away and trying to will probobly make ur olam habah dissapear…..
Go google: selling olam haba on ebay
and youll see it