Registration CPA vs FTD cost: before moving budget

Look beyond the cheapest signup

But I wouldn’t automatically pick the lowest cost per first-time depositor (FTD), either.

Registration cost tells us how cheaply we’re getting people through the first step. FTD cost tells us more about what happens next. Neither number explains the whole story.

Three checks before moving budget

Before moving budget, I’d want to answer three questions:

• Are we comparing the same acquisition period, with enough time for those users to deposit?
• Are the deposits unique first deposits, rather than repeated events or repeat deposits?
• Is the spend actual billed cost, or an estimate passed into the tracker?

Use the signal to design a test

If those checks hold up, a placement with more expensive registrations but cheaper FTDs becomes interesting. It deserves a closer look, not an automatic budget increase.

With a small number of depositors, a few extra conversions can change the ranking. Different creatives, bids and audience mixes can also explain the gap.

I’d use that signal to design a controlled test, with a clear budget limit and decision rule, rather than move everything at once.

And a first deposit still isn’t profit. Customer value and retention matter after acquisition, too.

For other media buyers: when registration CPA looks good but downstream conversion is weak, what do you check first before cutting the placement?