This is a scam.
The only way to invest in Incent is through the ICO page and the bounty programmes you will find in this thread.
I'm afraid every ICO brings out these scammers. If it's not from the Incent team, ignore/report it. If you're in any doubt, check with one of the team here on on the Incent Slack.
Yes I was suspicious when he sent the first referral link and not related to incent
But I see the transaction in the address (1FXwVqEMGLniNDA5B47KrCQ1jioLzM1zAV) I'm afraid there are people fooled dev should make an announcement on twitter