I've never received an account giveaway and there's a chance now. Is there any risky factors we should aware and take care of?

The only 3 things I can think of:
1. IP address cross-country issue. The tracker may ban account or at least ask for a justifiable reason because of it.
2. with or without the binding email? if without email and we have to modify the email of account, in the view of staff, isn't this more suspicious when combined with the first IP address point? Any advice to handle it?
3. username is the same or not as other's account of the giver at other trackers? If so, we may be implicated

Anymore things gentleman? (not saying account giveaway is bad because of this factors. any giveaway deserve to be thanked. just caution is the parent of safety.)