Before he played in his first game last month for the Rumble Ponies — the Mets’ Class AA affiliate — Binghamton had a touch of Tebow fever. Downtown businesses had perked up, counting on an influx of new customers. There were Tebow-theme menu items, like Beer Tree Brew Co.’s Tebow Time I.P.A., served at Craft Bar and Kitchen, and an array of Tebow-inspired sandwiches elsewhere. Local churches have coveted his presence. ...What has become known as the Tebow effect — the economic benefits generated by his celebrity — comes at a fortunate time for Binghamton, a proud baseball city that was on the verge of losing its team just a couple of years ago.