Can we expect any rewards , for participating in them in Q4 2023?
I really can't guess what project you are talking about. But for advice, you have to read their rules and commitments in the testing program. Make sure they promise decent value for your work. And don't forget to see the potential the project has. If there is nothing clear about it, it is better to just not go along with it. Why you wasting your time for useless things? Especially if it requires you to spend your dollars to buy their coins with tempting promises. Stay away from them. It's better to invest in coins that are already has names.
Actually, there have been a lot of Airdrops and Retrodrops that have generated big profits recently, it's just that we need to analyze projects that really have good potential in the future, never get involved with other people because that will waste your time. Especially if you take part in a retrodrop that requires capital, of course the analysis of the project you are taking part in must be detailed so that you don't lose. Usually retrodrop can also get profits many times over with the capital we have. This all requires sufficient knowledge, not reckless capital.
There is no airdrop that guarantees profit because there are so many participants. So if you don't want capital but want the airdrop to land in your wallet, you have to complete a lot of tasks and don't just work on one project, you have to work on many projects. My advice is to look for information on Telegram or other social media if you are really serious about exploring airdrops which have good prospects in the future.