Here is something conferences can do: run the conference in a visa-easy country. These usually happen to be: 1. Cheap and 2. Welcoming because they need the conference economic activity.
Of course this is unlikely to happen because the companies running these conferences are mostly based in the EU/USA/UK and would not bother with the inconvenience.
Of course this is unlikely to happen because the companies running these conferences are mostly based in the EU/USA/UK and would not bother with the inconvenience.