Faustus has sold your xxx Speak to him in your hideout to collect your earnings

"Faustus has sold your xxx. Speak to him in your hideout to collect your earnings"
"Faustus has sold your xxx. Speak to him in your hideout to collect your earnings"
"Faustus has sold your xxx. Speak to him in your hideout to collect your earnings"
"Faustus has sold your xxx. Speak to him in your hideout to collect your earnings"
"Faustus has sold your xxx. Speak to him in your hideout to collect your earnings"
...
I am/we are spammed with these notifications.
I/we would like to get rid of it. (At least optionally.)
In general, please do not introduce any new message which is not avoidable. (Always add an option to switch it off.)