MATE Desktop Environment is totally free and everyone involved are volunteers.
Please consider donating to the MATE project. It is nice to have the effort we’ve put into it recognised. Any money raised will be used to cover hosting costs, any hardware procurement and possibly travel expenses so that members of the MATE team can attend relevant conferences.
We don’t ask for much, it is at your discretion.
We’d prefer you set-up a recurring payment to help ensure that monthly costs are always covered and it also allows us to better plan how to reward our contributors and sponsor other Open Source projects. That said, one time donations are also gratefully accepted.