SQL Server - Query with MAX(CASE ..) and GROUP BY runs too long - sql-server

Question

I added to my query max() and group by to exclude duplicates and now it's running very long, 56 minutes.
But before adding max() and group by it was running 7-8 min. It's ok, I'm using aggregate view in join and it takes time.
Without max() and group by I had duplicates of customers who opted-in and not opted-in. Where I wanted just to put value "1" if I see that customer has OptIn as "1".
Here is my code:
WITH
cteURC AS (
SELECT
distinct scvid
,MAX(CASE WHEN who = 'urc' AND OptIn = '1' THEN 1 ELSE 0 END) AS URC_OptIn
FROM
scv.OptIn
where who = 'urc'
),
cteSponsor AS (
SELECT
distinct scvid
,MAX(CASE WHEN who = 'sponsor/3rd party' AND OptIn = '1' THEN 1 ELSE 0 END) AS Partner_OptIn
FROM
scv.OptIn
where who = 'sponsor/3rd party'
GROUP BY scvid
),
cteLeinster AS (
SELECT
distinct scvid
,MAX(CASE WHEN who = 'leinster rugby' AND OptIn = '1' THEN 1 ELSE 0 END) AS Leinster_OptIn
FROM
scv.OptIn
where who = 'leinster rugby'
)
SELECT distinct(c.[ScvId])
,Title
,FirstName
,LastName
,EmailAddress
,DateOfBirth
,Address1
,City
,Telephone
,Gender
,URC_OptIn
,Partner_OptIn
,Leinster_OptIn
,MAX(CASE WHEN c.ScvId = T.ScvId AND ProductId = '2019' THEN 1 ELSE 0 END) AS FinalTicketPurchaser_2019
,MAX(CASE WHEN c.ScvId = T.ScvId AND ProductId = '2018' THEN 1 ELSE 0 END) AS FinalTicketPurchaser_2018
FROM scv.vwCustomer c
LEFT JOIN cteURC U ON c.scvid = U.scvid
LEFT JOIN cteSponsor S ON c.ScvId = S.ScvId
LEFT JOIN cteLeinster L on c.ScvId = L.ScvId
LEFT JOIN vwAggTransaction T ON c.ScvId = T.ScvId
group by c.[ScvId]
Title,
FirstName,
LastName,
EmailAddress,
DateOfBirth,
Address1,
City,
Telephone,
Gender,
URC_OptIn,
Partner_OptIn,
Leinster_OptIn,
order by c.scvid
How can I change query to make it run quicker?
Update
I became brave and re-wrote query. I was hesitating as my friend wrote the ctes and I thought that they are necessary.
This version works well and fast. Thank you everyone. I really appreciate your input!
SELECT (c.[ScvId])
,Title
,FirstName
,LastName
,EmailAddress
,DateOfBirth
,Address1
,City
,Telephone
,Gender
,MAX(CASE WHEN who = 'urc' AND OptIn = '1' THEN 1 ELSE 0 END) AS URC_OptIn
,MAX(CASE WHEN who = 'sponsor/3rd party' AND OptIn = '1' THEN 1 ELSE 0 END) AS Partner_OptIn
,MAX(CASE WHEN who = 'leinster rugby' AND OptIn = '1' THEN 1 ELSE 0 END) AS Leinster_OptIn
,MAX(CASE WHEN who = 'connacht rugby' AND OptIn = '1' THEN 1 ELSE 0 END) AS Connacht_OptIn
,MAX(CASE WHEN c.ScvId = T.ScvId AND ProductId = '2019' THEN 1 ELSE 0 END) AS FinalTicketPurchaser_2019
,MAX(CASE WHEN c.ScvId = T.ScvId AND ProductId = '2018' THEN 1 ELSE 0 END) AS FinalTicketPurchaser_2018
FROM vwCustomer c
LEFT JOIN OptIn o ON c.scvid = o.scvid
LEFT JOIN vwAggTransaction T ON c.ScvId = T.ScvId
group by c.[ScvId]
,Title
,FirstName
,LastName
,EmailAddress
,DateOfBirth
,Address1
,City
,Telephone
,Gender
order by c.scvid

Answer 1

I'm taking a stab at it without more information. I converted the CTE into OUTER APPLY. You might need to tweak it a bit for the cases when OptIn=0. Give it a try and see if the performance is any better.
SELECT distinct c.[ScvId]
,Title
,FirstName
,LastName
,EmailAddress
,DateOfBirth
,Address1
,City
,Telephone
,Gender
,URC_OptIn
,Partner_OptIn
,Leinster_OptIn
,MAX(CASE WHEN c.ScvId = T.ScvId AND ProductId = '2019' THEN 1 ELSE 0 END) AS FinalTicketPurchaser_2019
,MAX(CASE WHEN c.ScvId = T.ScvId AND ProductId = '2018' THEN 1 ELSE 0 END) AS FinalTicketPurchaser_2018
FROM scv.vwCustomer c
OUTER APPLY (
SELECT TOP 1 OptIn AS URC_OptIn
FROM scv.OptIn oiu
WHERE oiu.scvid = c.Scvid AND oiu.OptIn = '1' AND oiu.who = 'urc'
) AS U
OUTER APPLY (
SELECT TOP 1 OptIn AS Partner_OptIn
FROM scv.OptIn ois
WHERE ois.scvid = c.Scvid AND ois.OptIn = '1' AND ois.who = 'sponsor/3rd party'
) AS S
OUTER APPLY (
SELECT TOP 1 OptIn AS Leinster_OptIn
FROM scv.OptIn oil
WHERE oil.scvid = c.Scvid AND oil.OptIn = '1' AND oil.who = 'leinster rugby'
) AS L
LEFT JOIN vwAggTransaction T ON c.ScvId = T.ScvId
GROUP BY c.[ScvId]
Title,
FirstName,
LastName,
EmailAddress,
DateOfBirth,
Address1,
City,
Telephone,
Gender,
URC_OptIn,
Partner_OptIn,
Leinster_OptIn,
ORDER BY c.scvid