I think more important than the attendance count is the average price per ticket / total revenue.
The Sox are getting packed stadiums, and charging a lot more per game than during the tanking, when tickets were really cheap for most games (many discounts, $5 or $10 seats). I went to 8 games at $3 per game (weekday April/May/September) from a special offers in 2019, sure others got great deals as well.
It's obvious the Sox are comfortable both with remaining ticket revenue this year, and anticipated increases in 2022 season ticket and general ticket sales, to increase payroll to $160M with the Lynn signing. If they give Rodon a qualifying offer and or sign him or others, they can jack up payroll significantly more. If they reach or win the WS, I'd anticipate a $180 + payroll, with all the 2022 season tickets they can sell guaranteeing WS tickets like they did in 2005.
I'm glad the Sox fans choosing to go this year are having a great time, and the team is improving when it was touch and go through June with the restrictions, which still may return this Fall / next year.