The Taiwanese needs votes in the United Nations to be recognized as a state. Currently they have less than 30 votes but they care about it. For instance, Taiwan offers some commercial preferences, external aid, technical missions in agricultural area and some scholarships for the university.
Take the example of Paraguay where the taiwanese government made a donation to build the Legislative Palace, place where both Representative and Senators work everyday and make sessions in order to keep the vote of Paraguay in the United Nations and also to make the request to recognize Taiwan as a state in the General Assembly each year. This is a diplomatic tradition held since 1990 so far.
Take into consideration also the new plan they have in order to expand their commercial borders. President Tsai is looking to partner new allies in the Pacific but also try to keep the old friends in order to prevent another leak like Sao Tome.
Following the example of Paraguay, the benefits are small: for the ruling class, Taiwan helps with social credits for house development, scolarships and technical assitance in agriculture.
Again, the beneficies only goes with the ruling power.