Humble boss Alan Patmore said "Operational costs, such as the cost of acquiring content, have risen dramatically" which is one of the reasons why they're doing this.

Quoting: slaapliedjeIf that were accurate, attempts at making open source phones would have more platforms to choose from, and it seems to me the only ones they do tend to pick are the Mali GPUs. I'd have to look into it again, it has actually been a while. Still waiting on my Librem 5 phone...