Hey. I heard that NFT was used during the course of the ICO. Is it true?

Yep, the 0xcert team used them in order to improve the quality of KYC procedure.

How was it going? Didnt implementation cause fails?

On the contrary, they managed to simplify the procedure, at the same time improving protection of user data.

Does it turn out that the mechanism is developed by the team? Or did they use 3rd party elements?

The used onFido verification engine combined with very own Xcert KYC token. Such a system has no analogues in the world.

Will it be possible to use this solution for other ICOs? It seems to me that the team can make good profit on this.