That's waht ahappens when a commerial company advertizes that it creates a community project and wants thme to contibute and give their work time but can shutdown it without notice.

Twitter is alone not to do that (think about Google Map and its very unfair terms against the contributors that Google wants to involve to do free work: Google could also shutdown this at any time, and Google Mappers won't have any benefit, only Google wins)... So yes we can be ranting: we should clearly continue to campaign against these pseudo open projects lead in fact by corporates using unfair practices, only to increase their global audience, then become a global facility that will then be licended only for very limited use and with multiple filters (such as hiding relevant data and replacing it by commercial placements where those that want to be visible MUST pay an increasing price without any added value).