Travis,
My 4 original seeds were from the Doug Oster deal also. They (he) simply asked that you send back seeds after you've grown them out so others could share.
Mine never germinated so I had nothing to return.
Such a distribution set-up could lead to all sorts of problems. In todays world, there are people that would return any seeds, be it for a joke or whatever other reason. Not all tomato growers are as dedicated and well intentioned as we would like to believe. I know a few that go out of their way to mislead others and supply mis-information for whatever the reason.
Don't take this the wrong way, there are also some great people out there that bend over backwards to help others...but not all!
Camo