App owners who make money off serving ads are incentivized to do this (and have frequently been caught doing this).
You don't have to be old -- we still use FTP all the time at my job. Of course, whenever we have a say we use some secure variant, but you don't always have a say (no matter how much you yell, grumble, sermonize about the dangers of insecure tech, etc).
Of course, you probably meant you feel old because "FTP" didn't immediately register to you as "Free To Play". Well, I can't help you there, because by that standard I guess I'm pretty old too.
:-D