Tfp shoots!!

guys,how many images do you usually provide to a model after a tfp shoot? i dont know if im dumb,ignorant or just plain naive.ive always supplied at least 2 and often 3 discs...all my models get close to or over 100 edited images from a shoot.the minimum ive provided is 55.so....i sent a second disc to 2 models middle of last week.bearing in mind they had both had around 60 images already i though it would be a nice surprise for them.this would have given them both around another 40 completely new images.but no.i didnt even get an acknowledgment from one of them and i know she recieved it friday.the other one i thought id text just to make sure so dopey ian says.."oh hi,have you recieved the second disc i promised you? im just checking the postman hadnt lost it etc."...and the day after..THE DAY AFTER !!!! i got an..."oh yeah,i got it thursday." ( this was today).not even a "thanks" or" yes sorry i have been busy i like them thank you "or even a " yeah i did but i hate em".grrrrrrrr.i feel like giving up,i really do.what with being let down with no shows etc its hardly worth the time and effort.id be interested to hear your thoughts.kind regards,ian.