collectFee uses a bare transfer with discarded return, so a non-standard WETH can silently lock fees

Description

The contract declares using SafeERC20 for IERC20 and uses safeTransferFrom in buySnow, but collectFee moves the WETH balance with a raw ERC20 transfer whose boolean return is ignored.

A token that returns false on failure instead of reverting (USDT-style) would let collectFee continue and report success while no WETH actually moved.

Risk

Likelihood:

Depends on the configured WETH-like token. Canonical WETH reverts, but any non-standard or fee-on-transfer token returning false on failure triggers the silent path; the SafeERC20 import shows the codebase already expects to guard against this class.

Impact:

Collected fees remain locked in the contract while the call reports success, so the collector believes funds were swept when they were not. Loss is bounded to accrued fees.

Proof of Concept

A mock WETH returning false on transfer makes collectFee succeed yet move nothing.

Recommended Mitigation

Use the already-imported safeTransfer.