They said initially you'd start out as a thin-blood then choose your clan later. In v5, when a thin-blood diablerises a clan vamp, he then ascends to a 13th gen vampire and this is how the Camarilla gets thin-bloods to do what they want, by using clan ascendancy as a carrot on a stick. Pg. 113 of the rulebook iirc.
Gameplay-wise probably so you have no ties off the bat, letting you choose between the Camarilla and Anarchs (and Sabbat?) from the start as you see fit I would imagine, since they're letting you join either faction; in contrast to the original where you were rooted to the Cam questline even if you were an Anarch playing along with them until the very end.
But who kept sending you chess emails?
No speculation is needed when you know what it will be. You are free to begin speculating if you disagree with the common opinion here,that the game will be a political communist garbage.
They are doing it to dumb down the game,to streamline the character tree to a few basic abilities at most.
The same guys who want to play as an "ordinary person" in DnD games, who insist that heroes must come with a flaw and on the extreme end, people who insist that a blind, crippled, deaf mute wizard is a viable character and the whole game must be catered to his myriad of disabilities or it won't be a realistic game (guess how long that character lasted).
It also governs what is the max level you can be in disciplines, IIRC.
Can thin-bloods become full vampires through the Embrace?
The website says that a mass-embrace is what kicks the whole thing off.
