The project is still running
Currently sps divs are paid out usually once a week occasionally more often
The buybacks have stopped due to vouchers price dumping badly and that's where the buybacks came from. As soon as the proces recover we will be resuming buybacks.
For now just enjoy the sps dividends and remember the tokens are all backed by splinterland licences so if we ever decide to end the project, licenses will be sold and all tokens will be bought back meaning noone should ever lose any money