previously I had never promoted a project with a long duration and recently I started to join a project with a long duration. for me it does not matter, as long as the project you are participating in is not suspicious and is really real. This is a choice, and of course the decision depends on you, if you are sure then continue and if you are not sure then leave or replace with another project.
Yes, we look at the quality of the project, not the short duration of the promotion. I think that now there are many bounties doing long-term promotions after that, we have to wait even longer for distribution, but we still research in the projects we are doing because if we don't do the research, then it will be useless if the project fails at the end.