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It's always cheaper, but it breaks theirs terms of service, and they may block you at any time. Not something any business will take lightly.

At that point, maybe businesses will stop caring. Especially in an era of cost cutting.

For the price Twitter is asking you could hire a team full time to maintain a scraper.

Well, one junior anyways...

Given how arbitrary their own decisions are (including breaching their own rental and other contractual agreements) i'd say its even odds.