[1] https://www.theatlantic.com/magazine/archive/2008/07/inconsp...
(I typed this from my phone)
What's worse is that there's a ready line of journalists talking about how capital letters promote inequality or shit like that providing coverfire for them.
'yes plaese
Sent from my iPhone'
Definitely a 'I'm very busy look at me' powermove
Anything else people read into it is very often just projection.
"thx" is way to verbose for anyone but a plebs, the real power brokers use "ty." Or they don't thank anyone at all, because they know just bothering to read the message they got is thanks enough.