This seems like a very broad list of targets. 20 countries, all projects and languages, for a week and a half, for a conference? I don't think this is worth such a heavy use of the CentralNotice.
I don't see any link to the notifications provided to the target projects of this proposal, as is required by the guidelines.
Oppose running this notice under these proposed parameters. --Yair rand (talk) 05:38, 22 July 2019 (UTC)
@Kyykaarme: It is displayed on all projects, for visitors from AL, BA, BG, BY, CY, CZ, EE, FI, GR, HR, HU, MD, ME, RO, RU, SE, SI, SK, TR or UA, see campaign for details. Best, --Martin Urbanec (talk) 20:22, 30 July 2019 (UTC)