Actually I just wanted to clarify why this happens.
An individual within a region should have the same chance as every other individual within the region - right? Well imagine two countries where one country (country A) has 1000 people that enter the lottery and the next country (country B) has 100,000. In that case, the country B should have 100 selectees for every 1 from country A - right?
Well that is exactly what is happening with countries like Iran and Nepal. They have far higher entries than other countries in Asia. So - countries like that get limited in the draw process - they get cutoff when the reach some point (like 6000 selectees including family). If they had 10k selectees, that means 4000 would be "disqualified", never being told they were winners. Obviously the limit is imposed after the first 6000 selectees for a country - and that is why some countries have a lot of selectees in lower number ranges. Early CEAC data showed Iran were getting 40 winners, Nepal 40 winners and rest of Asia combined were getting 20 out of every 100 selectees. At some point the 6000 limit stops further selectees appearing for a country - and once Nepal and Iran are out it means their 80 cases per 100 are no longer there - so the VB can move much faster.
You might think this is unfair - but it is based on the number of entries by each country. Actually if anything, the artifiial limit means that an entrant from the special countries has LESS chance of being a selectee than others, but on the plus side if they do get the 1NL - they are more likely to have a low number. Incidentally - the artificial limit makes sense for a country that could hit the 7% limit with 6k selectees BUT very few countries can do that. A country needs a high response rate and a high success rate. Nepal is one such country. IN 2013 they only had around 4k selectees but achieved 3300 visas. However, AF countries (with lower response rates and lower success rates) cannot hit the 7% limit even with 6k selectees.