Hey Narisa!
Right now we can only bill by 6 month and 12 month periods. (We also give a 10% discount when an organization pays for 12 months by invoice). We are getting alot of call for the quarterly invoice — so we might make an addition to our billing system soon to accomodate it — i’m not sure.
Will you be going to SxSW again? We submitted a bunch of panel ideas this year ;)
http://www.surveygizmo.com/sxsw-panel-picker/
Let me know if I can help youw ith anything else.
Cheers,
Christian