It doesn't have to be quite as simplistic. You can give them choices. There could be IP escrow companies you could pay. You can give them the choice of hosting

It doesn't have to be quite as simplistic. You can give them choices. There could be IP escrow companies you could pay. You can give them the choice of hosting in perpetuity or releasing something on some date. You can tie all these choices to a tax structure, progressive charges, etc. You could make the cheapest thing to simply sell the product outright. In theory you could even tie these additional protections to the a condition of making the release public at some point as a way of incentivizing companies not to use copyright protection on something that is not likely to be that valuable in 95 years, though that's unrealistically utopian of me to suggest. My main point is that it doesn't have to be that simplistic.