[Solved] Transfer using "Select Available Net Receipts"

Somewhat of a general query slash feature request, hope this makes sense:

Background:

• We use Sumup/Stripe/paypal to take online/card payments, the transactions of which are imported into clubtreasuser 
  • These services as i'm sure you know, have payout schedules which transfer the funds daily, weekly or monthly etc.
• We created an "account" for each service in club treasurer to accuratly reflect any amounts held by these payment providers which have been taken, but not transferred into our accounts.
• Once we receive the payout, we 'transfer' (between the accounts defined in club treasurer) the amount from the online payment provider account to the 'bank account' account.

As we export transaction records from the various payment providers and import these into clubtreasurer,  it would be quite convinient to be able to select specific transactions that formed the payout to us using step 2 of the transfer process. However, it seems that you can online select transactions in this way if the account type is a cash account. 

Is there any scope of allowing this functionality to online payment accounts also, or is there an accounting reason why this isnt the case?

TIA