Almost all these DFY online accounting service platforms suck. We have had bad outcomes with the few we’ve worked with. 
Here’s what it was like:

They usually have a US rep (typically a CPA) managing a team of offshore bookkeepers. As it turns out, the CPA’s don’t really do anything themselves, they just rubber stamp stuff done by their mid 3rd world teams. Then they charge you like 10X or more per month of what you’d pay to hire a full time team member for the same job. Oh yeah and the more money you make, the more they charge you…

Your rep and team are typically spread out across a bunch of clients, so you don’t get the personalized or customized solution they pitch you when signing up. The day to day reality is the offshore teams are always churning as they switch in & out new peons, so you get asked the same questions about how to label expenses, over and over. They never really get deep into the weeds of your financials. 

Worst of all, I made some strategic errors with expenses and overpaid my taxes based on the numbers I got from the firm I worked with. Many of them are geared for unprofitable VC back businesses so they were shocked that my business actually earned money. Early warning sign of a bad fit that I missed. 

I think the best solution for people in the ecom/advertising industry is to have a dedicated person (or team) in house. In our case the same person can do bookkeeping, tax filing, apply for R&D tax credits, send out invoices, chase down payments, manually double check our costs across all ad platforms, cancel unused subscriptions, etc. Those other services out there will nickel and dime you with expensive upsells for every one of those tasks (if they can even do them at all). 

So, don’t make the same mistake I did. 

Just keeping it real.