I'd think that's account is a scammer (not 1xbit's team) since 1xbit had same signature campaign about BIG 5 - Five Championship-Five Bitcoins event [CFNP] 1xbit.com | Five Championships - Five Bitcoins Signature Campaign and still continued until now.

While in the current new campaign, there's some red flags:
1. Didn't bought copper membership (previous other 1xbit accounts had bought copper membership).
2. Promoting same event and hiring to much participants.
3. Using same signature like the previous campaign.