The legal analyses I've found fall on one of two sides:
1. IP licenses, especially one sided take it or leave it licenses, are revocable, sometimes even if the license expressly says otherwise because of restrictions on perpetuities.
2. A license turns into a contract when there is consideration from the other side. Licensing your own work under a license because of a virality/share-alike clause has mixed reactions on if its consideration but more fall on the side that it is than it isn't.
Neither of these positions would seem to be to distinguish the OGL from GPLv2 here, and position 2 would set a position where OGL is not revocable but MIT/BSD are.
1. IP licenses, especially one sided take it or leave it licenses, are revocable, sometimes even if the license expressly says otherwise because of restrictions on perpetuities.
2. A license turns into a contract when there is consideration from the other side. Licensing your own work under a license because of a virality/share-alike clause has mixed reactions on if its consideration but more fall on the side that it is than it isn't.
Neither of these positions would seem to be to distinguish the OGL from GPLv2 here, and position 2 would set a position where OGL is not revocable but MIT/BSD are.