Perhaps I can make my answer a bit more nuanced. In the right conditions, selling your senate votes could be quite useful. At the current moment I am not aware of any insurgent senate campaigns, so it's probably a futile effort now. But in the past we have had senators running who relied on buying votes and currying favour with others so that they could get elected and wreak havoc. It has been quite successful. I doubt it will happen on green, but maybe yellow or maroon or pink or another colour with diverse politics and lots of smaller alliances.
By the way, I just looked up your nation and realised your the random person who sent me aid. Cheers.