The user privileges in MMSE grants access to various site tools, with a higher reputation granting access to more tools, reflecting a level of trust in the user's actions.
As seen from the image below, the reputation changes required to attain new privileges follow a pattern where each subsequent privilege requires nearly double or triple the reputation change of the previous one, or at least equal reputation change as the previous one. For instance, marking questions as protected requires a 1500 reputation gain, while access to moderator tools required a reputation gain of 500.
However, I observed the following departure from this pattern. To become a trusted user, only a 500 reputation gain is necessary after a previous step of 1500 reputation gain. Moreover, the final privilege, which is granting access to site analytics, requires a 1000 reputation gain. This means that the last three steps require the reputation gains in the following order of 1500 -> 500 -> 1000 while the three preceding steps were 250 -> 250 -> 500
What could be the underlying reason for this deviation from the expected pattern?