That seems to go against the idea of tip4commit, the idea is that contributors (through pull requests etc) can be compensated as well automatically. Same if there's multiple contributors to a project the compensation is split between them based on the amount of commits they make.
Couldn't that be fixed by having contributors creating a specifically named repo with the address in a file? Still opt in. It could be opt in for the maintainer too, following jchrisa's suggestion, meaning the maintainer could veto payments.
