I honestly do not see why people ask this. If you plan on leaving within the next month or two, or don't see a use in it, then don't upgrade. If you really want to stick around and want the perks associated with upgrading, then go for it.
Congrats on the upgrade man, but this question shouldn't need to be asked. Upgrading is whether or not you want to show you support the site, not as a way to become "trusted"