I just got one, hang on I'll post it
Ingo here again. I hope this day is treating you well. I am sorry if the developer is not replying to you.
It looks like the developer is getting people to recruit other people before providing any kind of reward; like a pyramid to create a social network.
None-the-less, if things change within an App, even as a result of something occurring between the developer and Apple, then only the developer can release that information.
Al this point Sarah, since the developer is not answering your question, your recourse is to be provide feedback on the iTunes feedback page.
On your behalf Sarah, I have submitted your request to know why a feature is no longer present in an App, to the iTunes store.
If you would like to also voice your opinion, then I encourage you to also use the iTunes Feedback page to submit your comments about your concern. Apple recognizes that no one is better qualified to provide feedback about iTunes than the people who use it:
Thank you in advance, for taking the time to contact Apple about improving iTunes. Your efforts to share your feedback are very much appreciated and will be addressed. By taking the time to contact Apple about your concerns, you provide valuable input on how to make iTunes better for everyone. Your email may make the difference.
I hope that you continue to enjoy shopping on the iTunes Store, Sarah. If you have any further questions feel free to respond to this email and I will be more than happy to help. Have a great day!
iTunes Store Customer Support