I hope there continue to be legitimate substitutes. I still remember when Twitter decided to add the key limit to their API shortly after releasing their official mobile clients, for the sake of "maintaining a consistent user experience" or something like that.
>shortly after releasing their official mobile clients
???
On android, 'reddit is fun' is great. Because of it I was never wanting for an official app and I knew that whatever they released officially wasn't going to be that good. Not out of the gate anyways. So far the release of the official app has just been mildly inconvenient for me, 'reddit is fun' had to be slightly renamed and the icon changed. But whatever.
It is, however, an app with legitimate substitutes, so an incumbent must be equal or significantly greater.