It appears that Lido has reduced rewards for MATIC LPs for the month of December in order to accommodate a new system of rewards distribution that they are introducing. This new system seeks to reward LPs for their long-term commitment to the project, rather than just their short-term contribution. This will likely result in a more sustainable and equitable rewards system for MATIC LPs in the long run. However, in the short term, some LPs may experience reduced rewards as Lido transitions to the new system. It is important to note that this change is likely to benefit MATIC LPs in the long run, as the new system should ensure that rewards are more fairly distributed.