Self-investment by businesses is not new and has long been a standard tool for price stabilization (or inflation) in the traditional financial market.
Binance, Nexo and others are among the projects that have carried out buybacks. Nexo's buyback, for example, was motivated by the core development team's conviction in the asset's significant undervaluation. As a result, they decided to decrease the number of project tokens in circulation to aid in market price correction.