Ah, well you can of course inject some shout outs if you like. I personally never did this with my mixtapes, I wanted people to be able to listen to my mixes several times if they liked them without having my name pop up in the same place a few times every tape. But that is just me.
And as far as people getting gigs from your mixtapes, if it happens, they will sooooo fall flat on their face if they can’t reproduce what they sold. There will always be lazy and/or fraudulent people that will take advantage of other peoples hard work. Unfortunately the amount of stress, time and effort that goes into trying to prevent this from happening (like copy protection no system is ever watertight so trying is all you can do) is a waste of time, imho. Better to put that time and effort into your own improvement. So by the time someone uses your time, it’s already yesterday’s news.