I'm cautiously optimistic for a good outcome for the Plaid folks here: last round was two years ago for $250M. Could they have been suffering $10M/month losses and are running out of money? Could be.
No offense to Visa, but I don't think of them as the most innovative organization or one that is a sign of a "good outcome" for a company getting acquired. I can't think of a good exit to Visa, but I am open to being wrong on that one.
Disclosures: worked at Stripe; dealt altogether more than I would have liked with Visa. Have no knowledge of Plaid's particulars.
Edit: Visa and Mastercard were strategic investors in the C round. Curious what the competitive dynamics were that led to Visa grabbing the acquisition instead of MC. https://techcrunch.com/2019/09/16/plaid-announces-strategic-...