Atletico Madrid must be close to making the deal permanent now. Griezmann has always been showing his best performance at Atletico Madrid actually. Barcelona have made a huge mistake by signing him permanently. Now they are just trying to get rid of him as fast as possible. As they have made many transfers in the recent times, they had better raise some funds to relieve more financially.
Maybe they have made new sponsorship deals they are still not in a very bright financial condition. As they are going to pay a lot of money for salaries as well it is better for them to sell Griezmann. His salary is quite high now.
Griezmann was one of the failed transfers that Barcelona had ever made, while at Barcelona Griezman did not contribute much, very different from Lewandowski who immediately made a good contribution to Barcelona. Now Barcelona and Atletico Madrid have reached an agreement for the transfer of Griezmann for a value of €20 million + €2 million in variables and the player has agreed to stay permanently at Atletico Madrid.