Giving your downline rewards, TCredits or incentives I think will motivates them more and it will build a good relationship between u as a sponsor and your affiliates. I don't see any reason for that to bite you in the future, however I see a good team spirit that would grow your generation and it would teach them the lesson to do the same to their downline. And it will motivates the other affiliates who are not doing well to improve their performance. I won't call it a bribe but rewards/gifts.