Reduce risks, lower barriers, allow more enthusiasts to participate, and increase project activity index

[jekc2008]

Setting a lower limit for computing power below 100TB or 10TB exempts punishment, which is equivalent to providing entry-level benefits to enthusiasts and allowing more SPs to participate in the Filecoin project.

设定算力下限，低于100TB，或者低于10TB的算力，免除惩罚，相当于给爱好者，提供入门福利，让更多的SP参与filecoin项目。