> but you are discontinuing the product for your own reasons.

This is not correct (or, is misstating the reality). They're discontinuing their product because Twitter banned their API keys/developer account and no longer supports third party clients through their API. There is no longer a supported API for Twitterific to use.

Unsure if you're familiar with what happened over the past week, but twitter revoked their access without any announcement or communications. Openly hostile towards developers using the API.

To continue developing and supporting Twitterific would be to fight against someone/a company who does not want them.