Ultimately, blind customer testing is the most valuable tool we have to determine if a source is running a tight ship.Looking at it from the perspective of a source, the vetting could possibly be stricter in some regards, as there are so many ways to manipulate what you see vs what you get (I've recently discussed the problem of not being able to strictly tie a batch number to a given product, or a blind test to the product supposedly tested), but having talked about this openly with some of the smartest guys here, noone has come up with an ideal solution so far - everything leading up to the end product can be faked/manipulated by the source, so my idea was to focus on enabling the community to test what they end up getting more thoroughly because it has to literally be out of the source's hands for genuine results.
As far as a better way to keep track of batches and keep sources honest. Maybe y'all should let us know ahead of selling a new batch, when it was made and how much was made of each compound. Then maybe a picture of the completed batch to help confirm how big the batches are. That way, if a huge batch was supposedly made, they can show a picture to support and alleviate possible worries we may have that they are making multiple batches with the same number.
Unfortunately, there isn't a perfect solution to this problem and a certain amount of trust has to be given, regardless.
But I do think knowing the batch sizes of different products would be helpful in keeping track to some degree.