The small servicer definition isn't in the RESPA rule (although it affects your required level of compliance with the RESPA servicing rules in Regulation X). It's found in section 1026.41(e) of Regulation Z. You may have misunderstood the presenter, since handling these "contract collections" for customers has been a problem for small servicers since the servicing rules became effective.
There's actually a pending amending to those rules, at 1026.41(e)(4)(iii)(D), that allows a small servicer to handle some of that type of business (for one property seller financers) without it being counted against them. That amendment is effective October 17, 2017.
Under current rules, the fee makes the contract "poison," killing your ability to qualify as a small servicer.
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John S. Burnett
BankersOnline.com
Fighting for Compliance since 1976
Bankers' Threads User #8