I would say the main deterrent is this company's reputation. Should they breach the agreement, it would be public knowledge. However, if they went ahead with a delisting anyway, under that scenario we would need to consider legal options and whether that is worthwhile expense... we could pursue the initial funds rebated for example. This seems like a very low risk to me given the company has a reputation to protect and once listed, the cost to them of maintaining the listing and fulfilling their end of the agreement is quite low.