Darth_Xiane And they can.
MGS means that, for the first 4 months after going premium, the author CAN (mind it's not a must) accomplish the following requirements: publish a minimum of 1,5k daily, not skipping a single day. If the author does so, he's eligible to earn the MGS. If the author opts for not doing so, nothing happens.
So, if I wish to go premium but for n reasons, I don't write 1,5k daily, it's not like they will kick me out of premium and unlock my walled chapters. It just means that I'm not eligible to earn the MGS.
AND, the MGS is valid for the first four months after going premium. Meaning, if I don't wish to keep updating 1,500 words daily after getting my four months of MGS, I can do so.