Just keep in mind guys, AZBox maker
OpenSat is very young family business started in 2007, and they didn't expect their receiver to have such interest throughout the world. For now, they do not manufacture any receivers for US market at all, and dual DVB-S2 tuner is a welcome option first of all in Europe and other places. Blindscan has a much lower priority for European market, where FTA channels are in abundance, and other options are plentiful as well. However, adding firmware code to utilize hardware blindscan capability requires a lot more work that they can handle at the moment, given multitude of other tasks at hand.
Consider AZBox blindscan as an advertising trick rather than foreseeing reality. Was it even confirmed that DVB-S2 demodulator chip they use (what model?) offers blindscan circuitry? If not, it would need to be supported by AZBox main processor, which can't compete with an average PC processor's power anyway. It may also be the reason, they can't go beyond ads on blindscan. As to hardware design errors, they do happen even with long term players, and that's why most electronic products go through multiple revisions over their production lifespan. No-one expected from a 2-year company to create such a popular and versatile product like AZBox in the 1st place.