https://www.reuters.com/article/pinterest-m-a-paypal-hldg/paypal-in-45-billion-bid-for-pinterest-sources-idUSKBN2HA1XT >(Reuters) -PayPal Holdings Inc has made an offer to buy digital pinboard site Pinterest Inc for $45 billion, people familiar with the matter said on Wednesday, a combination that could herald more tie-ups between financial technology and social media companies in e-ecommerce.