That is a good thing that widget users can add or remove the “Get Widget” button. But will be there a option in the future to add your own custom button ?
I tried both for my widget distrubution, i use Gigya right now, but i must commit that clearspring is getting better , not only with the addthis button, but also with their widget distrubution on desktops, and social spaces like igoogle. I think it's gonna be a hard game between gigya and clearspring.