He made it abundantly clear that Twitter doesn't want its API to be used for alternative twitter clients. IFTTT does not necessarily create alternative twitter consumption client but it can be used to accomplish that.
On a side note (and it may not be popular with HN community); so far we have seen API used (majority of times) for alternative twitter consumption clients. May be with these API changes, we might see more innovation using Twitter as a "platform"? Rather than people trying to create alternative clients.