Most suggest that cannot use ERC20 token as payment gateway integration .Why?
closed as unclear what you're asking by flygoing, shane, Richard Horrocks, Aniket, Achala Dissanayake Feb 21 at 19:47
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Is this possibly confusion about the definition of terms?
If a "gateway" is meant to mean machinery and a "token" is meant to mean something like a currency, then the proposition doesn't make any sense for the same reason that a "dollar" can't be a "cash register".
It's perfectly fine to make a token the accepted "form" of payment. You need a point of sale or "gateway" system of some kind to process payments. The tokens don't pay themselves.
Hope it helps.