I would rather agree to use technology from Stellar because at the moment they are more popular and more stable, not because they underestimate eth technology but they are currently down.
Thats just because Stellar does not have so many daaps like ETH and have more faster transactions.
BTW, what are the using of this token at all? For what are they going reward users?
There is a whole platform with 10 different types of real-life connected objectives to follow through every day regular activities, also social interactions and using technology for personal advantage in health and exploring progress made