Ignore those. You can donate ¥200/hh or ¥280/full and still deadfish and get kicked out early.
Most definitely, I tried all 3 for the heck of it, 140/200/280/300.
140 basics but you can get up sold lfk/dfk kissing or bbbj, end up costing 200
200 gfe you get bbbj, kissing maybe lfk or none
280/300 you get body 2 body slide which eats up half your time then you get the 200 treatment.
Depending on the girl there are certain NOs and ymmv
I’ve probably had my best experiences at Corg with the 140 option then tip them the upsell (my thought or assumption is you offer the low rate to the PO but the girl keeps more if she upsells you in the room without po taking a cut of the tips, but what do I know)
At the 280/300 rate go korg don’t even bother Corg