I have no experience with dynabeads or anything like them. I know how they're supposed to work, but know nothing about their effectiveness.
The easiest way to think of the difference between static and dynamic balancing is that static only deals with the up and down imbalance, and only uses sticky weights in one spot in the exact center of the wheel.
Dynamic balancing also deals with the "left and right" imbalance by placing weights either on the inner and outer lip, at different positions on the clock face or by using sticky weights as close to each edge as possible.
Most vehicles today have wheels that have a "positive" offset, so because the spokes are so far from the middle of the wheel, you can place sticky weights behind them and still be putting them on the right side of the wheel. But some wheels have offsets closer to "zero", especially trucks with wider than stock aftermarket wheels. It ends up making it so that the farthest you can place the sticky weights to the right is still the center of the wheel, meaning you can't dynamic balance it. It's like trying to sit in the middle axis of a see saw and trying to balance the weight of your friend sitting way out on the seat. Lots of times, less experienced techs try to dynamic balance these wheels when they should just static balance them. Static imbalance is what causes by far most of the vibrations you can actually feel. I seriously think it may not even be possible to feel a dynamic imbalance in a truck.