Anyone allowed to enter the pizzeria must sign a confidentiality agreement and do as they are told in exchange for free pizza.
The city has offered free housing to artists in exchange for engaging in the community and other stipulations.
Beyond touristic curiosity, a new kind of exchange is going on.
late 14c., "act of reciprocal giving and receiving," from Anglo-French eschaunge, Old French eschange (Modern French échange), from Late Latin excambium, from excambiare, from Latin ex- "out" (see ex-) + cambire "barter" (see change). Practice of merchants or lenders meeting to exchange bills of debt led to meaning "building for mercantile business" (1580s).
late 15c., from Old French eschangier "exchange, barter," from Vulgar Latin *excambiare (source of Italian scambiare); see exchange (n.). Related: Exchanged; exchanging.
exchange ex·change (ĭks-chānj')
v. ex·changed, ex·chang·ing, ex·chang·es
To substitute one thing for another. n.
The act of substituting one thing for another.