I put my coins to park back in August for 1 year at 70%, but it's seems it more lucrative to do it weekly. What's at the advantage of yearly? I haven't been following up on the project, I invested in the ICO and parked my coins. Is there some new info that I'm missing? I'm about to cancel the yearly parking and just go weekly.

There is no demerit so far.
The rate has been adjusted day by day, I think that one day it will be 2% or less.