Where do you get that information about profitability? According to BBC [0] back in 2019 expenses per barrel was $25 before taxes. Obviously sanctions make everything more expensive (hardware, extraction, transport, insurance), but not that expensive.

If selling oil was unprofitable Putun would just burn it instead of selling it at loss just like they burned natural gas for $10,000,000 / day for months.

[0] https://www-bbc-com.translate.goog/russian/news-50392407?_x_...