Originally Posted by VegasGambler

MPX does not code as travel with Chase (at least, not on my CSR). It codes as whatever category the store is in. So if I buy a starbucks card through MPX is codes as dining (3x pts on my CSR) but if I buy a Google Play gift card it codes as "other" and I get 1 pt.

On the other hand, with my Amazon Visa (also from Chase), Amazon GCs through MPX do NOT earn 3x pts (they come through as "other purchases"). Presumably they are looking at the payment processor to determine the bonus -- if it's not Amazon, no bonus.

Of course Amex may do things differently. But any broad statements about whether they count as travel or something else is dependent on, at least, the credit card company, and, more likely, the actual card. My suggestion is to buy a small-valued GC for somewhere where you shop anyway, and see how it codes, and don't expect it to be consistent across all your CCs (so if you don't like the result, try a different card)