Blackberry Limited is a Canadian company.
Canada ist one of the Five Eyes, i.e. the world-wide surveillance net spun by the USA, New Zealand, the UK and Canada. A junior partner, of course, but a partner.
And as long as these four have reason to assume that they are first class partners (unlike, for example, dear cooperating Germany which still gets spied or sold out by her own agencies for illegal scraps of data), they will cooperate.