Allow individual tips outside of the pie concept
No explicit amount.
I'm wasn't a fan of Flattr because I didn't really want to Flattr evenly. I get Flattr's logic -- they determined that the subscription model was all that would work for them. Well, that's what might work for them but the subscription model sure didn't work for me and I quit using them after just one month.
Ok, .. so, what I'm asking is ... must you follow the same approach as Flattr, or can you at least give me the option to do a one-time prop where I set the amount and then click "Prop Once" or something like that?