It's a strange decision to not do this independently. So release what you were normally doing since you have that data then aggregate the additional data with them going back to 2020 anyway to include that month like all the other previous months.
Not really no. They haven't mentioned that as a reason at all. It shouldn't even be a reason because it's additional data that they're doing and could have still released the May data that doesn't include those additional stores yet, then have them added in July like all the other 'historical data' going back to 2020.
I'm not basing a major decision on May results but it would have been good to know the performance of Elden Ring Nightreign and Doom TDA while it was still new and relevant.
It's a strange decision to not do this independently. So release what you were normally doing since you have that data then aggregate the additional data with them going back to 2020 anyway to include that month like all the other previous months.