I'm skeptical of this reading of the leaks, which seems to be overly cynical. From what I see, there's the tweet from DungeonScribe reporting $30/month/player, saying 'these changes have come down from Execs', and the tweet from DNDShorts saying $30/month is for the highest tier and includes monthly content drops, then reading in that 'their dream is everyone pays $30/month'.
If there are more sources I'd be happy to see them. From these two, I gather that 1) there will be a tiered subscription service with a max tier of $30/month, and 2) everyone needs to have a D&DBeyond account of some sort to play.
But the jump from that to 'everyone needs to be a paying subscriber/everyone needs to subscribe to the highest tier to play' both seem unsupported to me.
A model more like:
Free = you can play, 1 character
$5/month = multiple characters, bonus minis + dice
$15/month = Full creator access, GM games, limited storage
$30/month = Early access to content, bonus assets and other goodies, unlimited online storage
seems both more in line with the industry and consistent with the leaked information.