Die haben ernsthaft eine Sperre eingebaut, dass man die Trial nur 3x pro 24h Periode starten kann:

"Due to a technical issue that has occured, FIFA 18 trial users may discover that they can launch the trial no more than 3 times per 24-hour period. Please accept our apologies as we are actively working on a solution for this issue"

Quelle: http://answers.ea.com/t5/Technical-I...270104/page/10
auf so eine Idee muss man auch erst mal kommen