"To cover a transaction" means to pay for or take responsibility for the costs or expenses associated with a particular financial transaction. Full definition
That is basically nothing, and won't even cover the transaction cost of buying and selling. (1stMillionAt33.com)
The company has kept this facet of their development plan fairly vague, outside of a few potential use cases like covering transaction fees and exclusive features. (sludgefeed.com)
For example, price and purchase protections tend to only cover transactions for 90 days. (valuepenguin.com)