UPDATE.
1. VERGE clearnet version was installed to reduce amount of orphans blocks found. It is safe to mine with less orphans now.
Hopefully it will improve accuracy as well!
Does it mean that orphan rate is not included in profit prediction? This would explain a lot, as suggested before.
Hope clearnet helps, because these orphans are anoying. However, I thought that ist due to relatively low hashrate in comparison to whole network, am I wrong?
I think wrong estimates were caused by worsen connectivity via darknet, hence orphans, hence lower end result. Now have fixed it, see it is much better already for last blocks in x17 Verge.