I don't think would broadcast a non standard transaction like an any-one-can pay transaction
this may not change much but when using coinb.in you can change the settings since they use different methods of broadcasting transactions. the settings button is on top right corner:
https://coinb.in/#settingsin fact they have 3 methods: coinb.in node, chain.so, blockcypher
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Macbook-air doesn't accept messages from newbies. Is there another way to get a referral code or another pool's pushtx that will relay a non standard transaction?
i believe
Quickseller still has access to F2Pool.