I don’t think PayPal blocked those accounts for political reasons. PayPal being a private organization has its set rules and if one party or individual breaks those rules, the organization has a right to deal with such adequately as they see fit.
The same could be said in the case of former president Donald Trump. His supporters, most of them republicans and conservatives argued that the twitter ban placed on his account is politically motivated and a move to mute him and free speech in general. Multiple times, he broke the rules and terms he agreed to when he signed up on twitter.
So PayPal might just be blocking accounts that has breached the terms and agreement and people would then scream political persecution.