Stock was an issue last week. There was an additional shipment on Monday but digital share was probably already big.
Ghost Recon follows the trend of western games selling less than their predecessor
Stock problems can’t make games to sell.
All games have bigger drops than usual. I wouldn't be surprised to see a 85%+ drop for this game.
The VAT increase won't affect the sales for too long. Probably 2 or 3 weeks max, and less and less every following week. People will accept it and move on.