AEoncase is obligated to collect VAT for services and products purchased by users of the European Union as per the EU VAT location rules for telecommunications, broadcasting and electronic services.
You can read more on EU VAT in the European Commission info page.
Corporate customers with EU VAT registration numbers can supply it at the time of purchase to obtain EU VAT excluded invoices, with reverse charge as per art. 44 & 196 - Dir 2006/112/CE.