[Kalium]

If you were a Sponsor in Liberapay and earning $30000 a month and then had disagreements with Liberapay's policies and want to get out, you now have to risk shaving off all your sponsors to switch to a different service like GitHub. Maybe some of your passionate existing patrons will go towards the extra effort to switch alongside you, but the reality is: most won't.

This isn't an argument against GitHub or LiberaPay. This is an argument against being locked in to any financial intermediary.

[SifJar]

Possibly a slight difference though in that GitHub isn't _just_ a financial intermediary; with all the other functionality on offer, it may be a lot easier to find something to disagree with/dislike