REVENUE

Revenue is as follows (in thousands):



	Year Ended December 31,
	2018		2017		2016
Revenue:
Mortgage products	$	242,175	$	275,910	$	219,991
Non-mortgage products
Credit cards	165,776		147,028		39,434
Personal loans	134,199		88,244		66,457
Other	222,715		106,554		58,520
Total non-mortgage products	522,690		341,826		164,411
Total revenue	$	764,865	$	617,736	$	384,402

The contract asset recorded within prepaid and other current assets on the consolidated balance sheets related to estimated variable consideration was $1.9 million and $4.8 million on January 1, 2018 and December 31, 2018, respectively. The increase in the contract asset from January 1, 2018 to December 31, 2018 is primarily due to recent business acquisitions. During 2018, the Company established a contract asset for business loans from a recent acquisition, for which the Company has determined it has established sufficient historical information to determine an estimate. Additionally, the Company increased the contract asset balance for the acquisition of Student Loan Hero, Inc. (“Student Loan Hero”), which was acquired on July 23, 2018.

As a result of the acquisition of Ovation Credit Services, Inc. ("Ovation") on June 11, 2018, a $0.4 million contract liability was recorded within accrued expenses and other current liabilities on the December 31, 2018 consolidated balance sheet related to the upfront fees paid by consumers.

Revenue recognized in any reporting period includes estimated variable consideration for which the Company has satisfied the related performance obligations, but are still pending the occurrence or non-occurrence of a future event outside the Company's control (such as lenders providing loans to consumers or credit card approvals of consumers) before the Company has a contractual right to payment. The Company recognized an increase to such revenue from prior periods of $0.7 million in 2018.