The donation number and MAC are used to verify that you are a valid subscriber, and if you are using a client made by dvbken, you just need to trust that your information is only passed between your Kodi and the server using secure http. If authorization is passed, you get the guide.
a better way m8 no worrying at all prior to adding your info to the guide //papiao.is/main/EPG/mac/00:1A:78:xx:xx:xx/donation/xxxxxxxxxxxx/fname/NFPSF3 run it 1 time in your webbrowser and you will get a reponse from papiao with a new link ://epg.ninja/auth/download.php?mac=00:1A:78:xx:xx:xx&donation=xxxxxxxxxxxx&ip=123.456.789.123&fname=NFPSF3&token=xxxxxxxxxxxxxxxxxxxxxxxx both these links are the same and can be used only papiao have added extra security of your ip and a token keep thie last link private on a txt and anything changes at all or your getting errors run the link in a webbrowser and your infomation will show and if they impliment it auto change the infomation to match the original. if like myself you have a dynamic ip then run the link each time your ip changes. this was my security i passed onto papiao a while back to allow the donator to maintain his/her own security they cant get that link once you have it from papiao thats it but you can use the generated link to keep your info locked and nobody can change them details