Promotion is a very important think. Everybody must know haw simple to check diploma. If it will be simple to check diploma it will be less fake diplomas.
Yes, they need a big advertising campaign. Agreements with educational institutions. In addition, many people do not know or do not understand the possibility of cryptocurrency. It will take time before such services can work everywhere.
The stuff of the companies who hire the people must know how to check diplomas. Usually they know that it is necessary to send a request to university and wait a lot of time for answer that is why they simply do not check the diplomas. If they will know that it is very simple to check the diploma they will check more diplomas.