Facing the small c‑bet with a gutshot and backdoor hearts, we should mostly raise big and sometimes call, rather than just folding.
On 9h 5d 3s rainbow, we’ve got high card plus a gutshot and a backdoor heart draw, but no made hand yet. This is a very dry board and BU has a slight range advantage, so checking our whole range is the right idea. With 76s we’re happy to check and let BU stab rather than leading into a stronger, more condensed range.
After we check, BU fires 1.8BB into 5.5BB. We’re getting about 4.1:1 and need only ~19.8% equity, while our hand has roughly 45.5% equity versus BU’s c‑bet range. This combo is a great candidate to raise big—something like 6.3–9BB—using our gutshot and backdoor hearts as a semi‑bluff. Calling is also reasonable, but folding would be giving up too much equity.