What is more important to the Anonymity set, the number of deposits or the total amount? if I understood correctly it's both, but according to what I understand from the "Anonymity Mining campaign" the goal is to increase the number of deposits only -- simply because when the 10,000 deposits number is reached there will be no incentives for people to keep their funds in the pool, so you would end up with 10k deposits and maybe next to nothing of BTC in the pool.
The reason why I ask is that I think there could be "easier" and probably "cheaper" ways to create those deposits if the only result required is a certain number of deposits, I understand that the pro of doing the Anonymity Mining campaign is that it would increase the level of trust since a mixer that ones had 1000 BTC and did not exit scam is unlikely to do so when they have 500 BTC.
As far as my understanding goes, we need both the deposits and also the deposit sums to establish a certain amount of anonymity.
Since the anonymity mining campaign rewards the user with a fixed percentage of their deposit, there is an incentive to deposit higher amounts. There is pretty much no point in depositing 15$ to earn 1% each month ($0,15) especially with the current transaction costs. Therefore people would deposit more to earn more money. Please correct me if I am wrong but I think those are the key points.
As of right now, there havent been an unusual large amount of deposits since the anonymity campaign went live but that will probably change once there is an official announcement in Services.