This idea came out of @Luddite's hypothetical question about early renewal if one ran out of data and did not want to wait, nor buy an add-on, nor change their plan (to force an early renewal).
Shazia confirmed for us that this is not possible in the self-serve system:
http://productioncommunity.publicmobile.ca/t5/Paying-for-your-service/Early-renewal-of-data-only-pla...
I'm thinking this is probably an uncommon scenario and may not warrant much priority, but it would be great to see an abiltiy added for folks to force an early renewal in self-serve without requiring a plan change. It would be totally fair to include the same forfeit that you get today if you were to do an immediate plan change. Basically, it would be an immediate plan change but to the same plan.
Thanks for your consideration!