That is highly unlikely. You need min 20 wins to get to silver. Then to get to gold, you need 36 wins at a 100% win rate. Combine this with the fact that anyone Garo farming is likely to also que for 8v8 given the que times it experienced, and I find it highly unlikely that anyone there for just Garo is Gold.
We need rank decay. Primal top 100 was basically static for months. And it should be regardless of if you have completed matches or not. It should be just a auto point loss, say 75 points a week, after you hit silver (and can't go below silver, 500 points). With the 60%ish win rates of the top players that would imply that they need around 15 matches a week to maintain there points. (that is assuming you win and loss about the same points each match, in the lower ranks you would need less matches to get the 75)
