AHT runs on a simple rule: browsing and searching are always free. Coins are only spent at the moment you actually want to contact someone or bid on a job — never just to look around.
Gold coins are the platform's spendable currency (1 coin = ฿100) — bought with a card or PromptPay, and spent to open a chat or place a bid. Silver coins are a loyalty currency earned through referrals; they're never bought, and 20 Silver can be redeemed for a ฿100 discount on a vendor's next subscription payment.