I run data collection scripts on 64 different darknet sites. Markets that accept both BTC and XMR get hardly any XMR deposits, WHM is a major market that makes up essentially all the XMR traffic but is growing much slower than BTC-accepting markets despite being very popular on Dread.
Those wages are severely off. Glassdoor is no longer used in the United States to research wages for tech. An average engineer at a top tech company makes well over 250k USD per annum.