It's certainly not a great business practice, and I can see why people are frustrated.
But in that same vein, what is the current wait time for a new TBAC suppressor if you purchase through them? 10-13 months? And that's paying full price.
I'm assuming that having to deal with the ATF makes things more complicated, especially if you have surges in demand (such as for a new product or for a BoGo). That said, you would think SiCo would've figured it out by now - they've had at least 6 years to do so. They should certainly have a good handle on what the demand will be.
On one hand, it's incredibly frustrating. On the other, you are still getting a free product worth hundreds of $. It doesn't seem like SiCo is going to change their businesses practices, so you either suck it up and understand you will be waiting a long time, or you pay full price for two suppressors elsewhere. Anyone going into the BoGo deal should have a clear understanding of what the deal is by now.