Hey! Yes, we turned down the 2.5 Pro free limits which were originally only supposed to be available for a single weekend. We have a huge amount of demand for 3.0 Pro and Nano Banana Pro right now so needed to move capacity there.
In general, for any models on the free tier, you should expect a highly unstable service. We are not building or providing guarantees on this tier and I would personally suggest not putting something into production with it. If you want to use the paid API tier 1, you can still access all of the models.