50% is insanely high. The chance of an alpha going up that fast seems slim at best to me. If nothing else, alpha means datamining on a massive scale. The datamining upstages their marketing campaign significantly and early datamining almost always has a few cases of incomplete information creating a mess with player perception; they do not want that at all until they have at least a bit of time for us to digest the information in the panel and in the encrypted parts of 9.2.5.
Let's expect a bit less.