Recently noticed that Treehouse has done something quite interesting.

Their community is voting on a new proposal: to take half of the income generated by the protocol to directly purchase TREE tokens in the market. If this passes, a buyback operation will have to be executed at least every seven days. More importantly, the tokens bought back will not be destroyed, but will be stored in the project's treasury—this may be used for ecological incentives later, or there may be other arrangements.

To be honest, using protocol income for buybacks is not a new trick anymore, but it shows that the project team is trying to create actual demand for the token. As for the effectiveness, it still depends on whether the proposal can be successfully implemented and how those coins in the treasury will be used specifically.