They do mate.
On 31 January 2019, Atlético announced the transfer of Emerson to
FC Barcelona, effective as of July 2019, for
€12.7 million.
[9] The deal consisted of a joint financial operation between Barcelona and fellow
La Liga side
Real Betis, in which each club paid half of the transfer fee and retained a percentage of Emerson's economic rights. He was to become a Betis player in July 2019, with Barcelona holding the option of reacquiring him for
€6 million in 2021.
I can see Barca just waiting till next year, buying him for 6m and moving him on, but we shall see.