I have tried to book through opentable not once but thrice and it just does not accept any card of mine. I then requested help and I get a rather flaky email about how the "weather is in the U. S vs Ireland" instead of actually addressing the frustration. Further to which after a week of not actually answering my question, they ask me if they should close the ticket and when I say I am still unable to book a table on their site, only to be ghosted again.
Utterly ridiculous and such a painful frustrating platform! Especially given the times we are in.
Certainly hope there are far better online platforms there for ppl to book and actually earn reward points.