What is with the payment processor icons in the sidebar?

[AncientWatcher]

I don't know how long they have been there, but their presence unnerves me.

 

[Mangamoz]

I don't know how long they have been there, but their presence unnerves me.

There is no icon, and if someone says there is, it's misinformation. If it actually is true, it's good for you.

 

[boursk]

It's been discussed in the announcement thread.

Tl;dr MangaDex offers payment options when users want to pay to be a supporter. Any (web)shop is required to show these icons if you want to offer those payment methods. MangaDex wasn't compliant before, so they had to add them now.