am sure they all realise how many fans and guys like them with the comments if they read them on the pearl tv page each day on youtube and the admirers they have when they wear tights/pantyhose and do dangling and show nylon feet etc and i'm sure the ladies know what they are doing and how much guys enjoy it and the way diana acts on camera i doubt she is shy when they are playful with each other! at this stage i doubt any of the others would join OF but you never know especially with the amount of proper celebrities who do onlyfans that people probably thought wouldn't so we can live in hope! 
Diana would probably do it but maybe she has other commitments or is too shy. Rebecca is happily married. Merve also works as a dental technician, so she probably earns enough money.